Lists of river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

s and stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

s in the U.S. State of Colorado.

Alphabetical list

The following alphabetical list includes many important stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

s that flow through the State of Colorado including all 158 named river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

s. Where available, the total extent of the stream's drainage basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 is shown after the name. The names of the 17 Colorado rivers with a drainage basin of more than 10,000 square kilometers (3,900 sq mi), about three times the area of Rhode Island are shown in bold.

1. Adams Fork Conejos River
2. Alamosa River
   Alamosa River
   The Alamosa River is a river in the southern part of the U.S. state of Colorado. It is about long, flowing roughly east through the San Luis Valley. Its watershed comprises about .The river's name means "shaded with cottonwoods" in Spanish....
   
    383 km² (148 mi²)
3. Animas River
   Animas River
   Animas River is a river in the western United States, a tributary of the San Juan River, part of the Colorado River System. The Spanish named the river "Rio de las Animas Perdidas", "River of the Lost Souls". It is also the last free-flowing river in Colorado. The river's free-flowing status...
   
    3,562 km² (1,375 mi²)
4. Apishapa River
   Apishapa River
   Apishapa River is a tributary of the Arkansas River that flows from a source near West Spanish Peak in southern Colorado. It joins the Arkansas east of Fowler, Colorado....
   
    2,798 km² (1,080 mi²)
5. Arikaree River
   Arikaree River
   The Arikaree River is a tributary of the Republican River that starts near Limon in Lincoln County, Colorado. The river flows east into Kansas, crossing the extreme northwestern corner of that state before entering Nebraska...
   
    4,429 km² (1,710 mi²)
6. Arkansas River
   Arkansas River
   The Arkansas River is a major tributary of the Mississippi River. The Arkansas generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas. The river's initial basin starts in the Western United States in Colorado, specifically the Arkansas...
   
   478,501 km² (184,750 mi²)
7. Aspen Brook
   Aspen Brook (Colorado)
   The Aspen Brook is a tributary of the Big Thompson River in Larimer County, Colorado. The stream's source is near Wind River Pass. It flows north to a confluence with the Big Thompson in Rocky Mountain National Park....
   
   
8. Bear Creek 4,500 km² (1,737 mi²)
9. Bear Creek 339 km² (131 mi²)
10. Bear River
    Bear River (Colorado)
    The Bear River is a tributary of the Yampa River. Its source is in the Flat Tops Wilderness above Stillwater Reservoir in Garfield County, Colorado. The Bear River flows northeast into Routt County and joins the Yampa River just east of the town of Yampa....
    
    
11. Beaver Creek
    Beaver Creek (Colorado)
    Beaver Creek is a tributary of the South Platte River in Colorado. The creek flows from a source in Elbert County to a confluence with the South Platte in Morgan County near Hillrose....
    
     2,939 km² (1,135 mi²)
12. Big Dry Creek
    Big Dry Creek (Littleton, Colorado)
    Big Dry Creek is a tributary that joins the South Platte River in Littleton, Colorado. The creek's source is in Daniels Park in Douglas County....
    
    
13. Big Sandy Creek
    Big Sandy Creek (Colorado)
    Big Sandy Creek is a tributary of the Arkansas River noted for being the location of the Sand Creek Massacre. Big Sandy Creek starts near Peyton in El Paso County, Colorado and flows through Elbert, Lincoln, Cheyenne and Kiowa counties before it joins with the Arkansas River in Prowers county...
    
     4,825 km² (1,863 mi²)
14. Big Thompson River
    Big Thompson River
    The Big Thompson River is a tributary of the South Platte River, approximately 78 miles long, in the U.S. state of Colorado.- Course of the river :...
    
     2,149 km² (830 mi²)
15. Bijou Creek
    Bijou Creek
    Bijou Creek is a tributary of the South Platte River in Colorado. The creek flows from a source in Adams County to a confluence with the South Platte near Fort Morgan....
    
     3,612 km² (1,395 mi²)
16. Blue River
    Blue River (Colorado)
    The Blue River is a tributary of the Colorado River, approximately long, in the U.S. state of Colorado.It rises in southern Summit County, on the western side of the continental divide in the Ten Mile Range, near Quandary Peak. It flows north past Blue River and Breckenridge, then through the...
    
     1,770 km² (683 mi²)
17. Boulder Creek
    Boulder Creek (Colorado)
    Boulder Creek is a creek draining the Rocky Mountains to the west of Boulder, Colorado, as well as the city itself and surrounding plains.- Route :...
    
     (1,160 km² (448 mi²)
18. Cache la Poudre River
    Cache La Poudre River
    The Cache la Poudre River is in the state of Colorado in the United States.Its headwaters are in the Front Range in Larimer County, in the northern part of Rocky Mountain National Park. The river descends eastward in the mountains through the Roosevelt National Forest in Poudre Canyon...
    
     4,959 km² (1,915 mi²)
19. Canadian River
    Canadian River
    The Canadian River is the longest tributary of the Arkansas River. It is about long, starting in Colorado and traveling through New Mexico, the Texas Panhandle, and most of Oklahoma....
    
    122,701 km² (47,375 mi²)
20. Canadian River
    Canadian River (Colorado)
    The Canadian River is a tributary of the North Platte River, located approximately long, in Jackson County in north central Colorado in the United States...
    
    
21. Chalk Creek
    Chalk Creek
    Chalk Creek is a river flowing east from the Collegiate Peaks mountain range in Chaffee County, Colorado. Mount Antero borders the southern side of the river, while Mount Princeton borders the northern side. The headwaters of the river are located at the Continental Divide...
    
    
22. Cherry Creek
    Cherry Creek (Colorado)
    Cherry Creek is a tributary of the South Platte River, long, in Colorado in the United States.-Location:Cherry Creek rises in the high plateau, east of the Front Range, in northwestern El Paso County...
    
     1,050 km² (405 mi²)
23. Chico Creek
    Chico Creek
    Chico Creek is a tributary of the Arkansas River that flows from a source in El Paso County, Colorado. It joins the Arkansas in Pueblo County just west of the town of Avondale....
    
     1,934 km² (747 mi²)
24. Cimarron River 44,890 km² (17,332 mi²)
25. Cimarron River
26. Clear Creek
    Clear Creek (Colorado)
    Clear Creek is a tributary of the South Platte River, approximately long, in north central Colorado in the United States. The creek flows through Clear Creek Canyon in the Rocky Mountains directly west of Denver, descending through a long gorge to emerge on the Colorado Eastern Plains where it...
    
     1,497 km² (578 mi²)
27. Colorado River
    Colorado River
    The Colorado River , is a river in the Southwestern United States and northwestern Mexico, approximately long, draining a part of the arid regions on the western slope of the Rocky Mountains. The watershed of the Colorado River covers in parts of seven U.S. states and two Mexican states...
    
    (67,993 km² (26,252 mi²)
28. Conejos River
    Conejos River
    The Conejos River is a tributary of the Rio Grande, approximately long, in south-central Colorado in the United States. It drains a scenic area of the eastern San Juan Mountains west of the San Luis Valley.-Description:...
    
     2,078 km² (802 mi²)
29. Crow Creek
    Crow Creek (Wyoming)
    Crow Creek is a waterway of southeastern Wyoming and northern Colorado. Crow Creek is formed by the merger of the South Fork of Crow Creek with the Middle fork of Crow Creek, with the quick addition of the North Fork of Crow Creek about downstream. All of the major tributaries of Crow Creek begin...
    
     3,717 km² (1,435 mi²)
30. Crystal River
    Crystal River (Colorado)
    The Crystal River is a tributary of the Roaring Fork River, approximately 40 mi long, in western Colorado in the United States. It drains a glacial valley, called the Valley of the Coal Miners, south of Carbondale which was historically known as a center of coal mining in southwestern Colorado...
    
    
31. Cucharas River
    Cucharas River
    Cucharas River is a tributary of the Huerfano River that flows from a source in Huerfano County, Colorado, southwest of the Spanish Peaks in San Isabel National Forest. The river passes through La Veta and Walsenburg before joining the Huerfano River in Pueblo County....
    
    
32. Dolores River
    Dolores River
    The Dolores River is a tributary of the Colorado River, approximately 250 mi long, in the U.S. states of Colorado and Utah....
    
    11,998 km² (4,633 mi²)
33. Dry Fork Michigan River
34. Eagle River
    Eagle River (Colorado)
    The Eagle River is a tributary of the Colorado River, approximately long, in west central Colorado in the United States.It rises in southeastern Eagle County, at the continental divide, and flows northwest past Gilman, Minturn, Avon...
    
     2,515 km² (971 mi²)
35. East Fork Arkansas River
    East Fork Arkansas River
    East Fork Arkansas River is a tributary of the Arkansas River that flows from a source in the Mosquito Range of central Colorado. It joins the Arkansas west of Leadville, Colorado....
    
    
36. East Fork Cimarron River
    East Fork Cimarron River
    East Fork Cimarron River is a tributary of the Cimarron River in Colorado. The river's source is near Wetterhorn Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the Middle Fork Cimarron River in Gunnison County to form the Cimarron River....
    
    
37. East Fork Eagle River
    East Fork Eagle River
    East Fork Eagle River is an tributary of the Eagle River in Eagle County, Colorado. The river flows from a source on Chicago Ridge in the White River National Forest to a confluence with the South Fork Eagle River that forms the Eagle River....
    
    
38. East Fork Little Cimarron River
39. East Fork Navajo River
40. East Fork Piedra River
41. East Fork Rio Chama
42. East Fork San Juan River
43. East Fork South Fork Crystal River
44. East Mancos River
    East Mancos River
    East Mancos River is a tributary of the Mancos River in Montezuma County, Colorado. The river flows west from a source in the La Plata Mountains to a confluence with the West Mancos River that forms the Mancos River....
    
    
45. East River
    East River (Colorado)
    East River is a stream in central Colorado. It flows south from Emerald Lake in the Maroon Bells Wilderness to a confluence with the Taylor River that forms the Gunnison River....
    
     762 km² (294 mi²)
46. Elk River
    Elk River (Colorado)
    Elk River is a stream in Colorado. It flows from a confluence of the North Fork Elk River and Middle Fork Elk River in Routt National Forest north of Steamboat Springs to a confluence with the Yampa River....
    
    
47. Encampment River
    Encampment River
    The Encampment River is a tributary of the North Platte River. The river's source is east of Buck Mountain in the Park Range of Jackson County, Colorado. The river flows north and passes through the town of Encampment, Wyoming before its confluence with the North Platte....
    
    
48. Fall River
    Fall River (Larimer County, Colorado)
    The Fall River is a tributary of the Big Thompson River in Larimer County, Colorado. The river's source is near the Alpine Visitor Center in Rocky Mountain National Park. It flows down a canyon and over Chasm Falls before a confluence with the Big Thompson in Estes Park....
    
    
49. Fall River
    Fall River (Clear Creek County, Colorado)
    Fall River is an tributary of Clear Creek in Clear Creek County, Colorado. It flows from a source just south of Parry Peak to a confluence with Clear Creek west of Idaho Springs....
    
    
50. First Fork Piedra River
51. First Fork South Fork Piney River
52. Florida River
    Florida River
    Florida River is a tributary of the Animas River in La Plata County, Colorado. The river's source is Lillie Lake in the Weminuche Wilderness. It joins the Animas River south of Durango on the Southern Ute Indian Reservation near the New Mexico state line....
    
    
53. Fountain Creek
    Fountain Creek
    Fountain Creek is a stream in El Paso and Pueblo counties, in Colorado in the United States.-Geography:From its source near the city of Woodland Park north of Pikes Peak, the creek flows southeast through the communities of Green Mountain Falls and Chipita Park to the town of Cascade. It...
    
     2,418 km² (933 mi²)
54. Fraser River
    Fraser River (Colorado)
    The Fraser River is a tributary of the Colorado River, approximately long, in north central Colorado in the United States. It drains large portion of the Middle Park basin in Grand County in the Rocky Mountains west of Boulder and southwest of Rocky Mountain National Park. It rises at the...
    
    
55. Frenchman Creek
    Frenchman Creek
    Frenchman Creek is a spring-fed waterway that begins in Phillips County, Colorado, crosses Chase and Hayes counties in Nebraska and ends at its juncture with the Republican River in Hitchcock County, Nebraska. The length of the waterway is approximately ....
    
     7,398 km² (2,856 mi²)
56. Fryingpan River
    Fryingpan River
    The Fryingpan River is a tributary of the Roaring Fork River, approximately long, in west central Colorado in the United States.It rises in northeastern Pitkin County, in the White River National Forest in the Sawatch Mountains along the western side of the continental divide. It flows westward...
    
    
57. Geneva Creek
    Geneva Creek (Colorado)
    Geneva Creek is a short tributary of the North Fork South Platte River, approximately long, in central Colorado in the United States. It drains part of the Rocky Mountains southwest of Denver in northern Park County. It rises at the continental divide west of Mount Bierstadt and descends through a...
    
    
58. Gore Creek
    Gore Creek (Colorado)
    Gore Creek is a tributary of the Eagle River, approximately long, in Eagle County in central Colorado in the United States. It drains an area of the Rocky Mountains at the south end of the Gore Range through Vail Valley. It rises on the Eagle County-Summit County border along the high crest of the...
    
    
59. Green River
    Green River (Utah)
    The Green River, located in the western United States, is the chief tributary of the Colorado River. The watershed of the river, known as the Green River Basin, covers parts of Wyoming, Utah, and Colorado. The Green River is long, beginning in the Wind River Mountains of Wyoming and flowing...
    
    (115,903 km² (44,750 mi²)
60. Gunnison River
    Gunnison River
    The Gunnison River is a tributary of the Colorado River, long, in the Southwest state of Colorado. It is the fifth largest tributary of the Colorado River, with a mean flow of 4320 ft³/s .-Description:...
    
    (20,851 km² (8,051 mi²)
61. Hidden River
62. Hill Branch Cucharas River
63. Horse Creek
    Horse Creek (Colorado)
    Horse Creek is a tributary of the Arkansas River that flows from a source south of Calhan in the Holcolm Hills of El Paso County, Colorado. It flows east and south to a confluence with the Arkansas in Otero County west of Las Animas...
    
     3,680 km² (1,421 mi²)
64. Huerfano River
    Huerfano River
    Huerfano River is a tributary of the Arkansas River that flows from a source near Blanca Peak in the Sangre de Cristo Mountains of Colorado. It joins the Arkansas in Pueblo County just south of the town of Boone....
    
     4,840 km² (1,869 mi²)
65. Illinois River
    Illinois River (Colorado)
    Illinois River is a tributary of the Michigan River, approximately long, in Jackson County in north central Colorado. It drains part of the North Park basin south of Walden....
    
    
66. Kiowa Creek
    Kiowa Creek (Colorado)
    Kiowa Creek is a tributary that flows into the South Platte River in Morgan County, Colorado near Orchard. The creek's source is in the Black Forest of El Paso County, northeast of Colorado Springs, Colorado....
    
     1,888 km² (729 mi²)
67. La Plata River
68. Ladder Creek
    Ladder Creek
    Ladder Creek is a stream that flows from a source in Cheyenne County, Colorado to a confluence with the Smoky Hill River in Logan County, Kansas....
    
     3,645 km² (1,407 mi²)
69. Lake Fork Gunnison River
    Lake Fork Gunnison River
    Lake Fork Gunnison River or Lake Fork is a tributary of the Gunnison River in Colorado. The river's source is Sloan Lake near Handies Peak in the San Juan Mountains of Hinsdale County. Lake Fork flows through Lake San Cristobal and Lake City before a confluence with the Gunnison River in Blue...
    
    
70. Laramie River
    Laramie River
    The Laramie River is a tributary of the North Platte River, approximately long, in the U.S. states of Colorado and Wyoming.It rises in northern Colorado, in the Roosevelt National Forest in the Front Range, in western Larimer County...
    
    11,961 km² (4,618 mi²)
71. Left Hand Creek
72. Little Beaver Creek 1,602 km² (619 mi²)
73. Little Cimarron River
    Little Cimarron River
    Little Cimarron River is a tributary that joins the Cimarron River in Montrose County, Colorado. The river's source is near Silver Peak in the Uncompahgre Wilderness of Hinsdale County....
    
    
74. Little Dolores River
    Little Dolores River
    Little Dolores River is a tributary that flows into the Colorado River in Grand County, Utah from a source in Mesa County, Colorado....
    
    
75. Little Dry Creek
76. Little Navajo River
77. Little Snake River
    Little Snake River
    The Little Snake River is a tributary of the Yampa River, approximately 150 mi long, in southwestern Wyoming and northwestern Colorado in the United States....
    
    10,629 km² (4,104 mi²)
78. Little Thompson River
    Little Thompson River
    The Little Thompson River is a tributary of the Big Thompson River and thence the South Platte River in the U.S. state of Colorado.The river's headwaters lie in the Roosevelt National Forest. It flows east through the foothills of the Rocky Mountains in Larimer County through the town of Berthoud,...
    
    
79. Lodgepole Creek
    Lodgepole Creek
    Lodgepole Creek is a tributary of the South Platte River, approximately long, in the U.S. states of Wyoming, Nebraska and Colorado. Lodgepole Creek drains a basin in the interior of a low plateau which lies between the South Platte Basin and the North Platte Basin in the southeastern corner of...
    
     8,374 km² (3,233 mi²)
80. Lone Tree Creek
    Lone Tree Creek (Colorado)
    Lone Tree Creek is a tributary that joins the South Platte River in Weld County, Colorado east of Greeley. The creek's source is west of Buford in Albany County, Wyoming....
    
    
81. Los Piños River
82. Mancos River
    Mancos River
    Mancos River is an tributary of the San Juan River. It flows from the confluence of West Mancos River and East Mancos River near Mancos, Colorado and joins the San Juan near Four Corners Monument in New Mexico.-See also:*List of rivers of Colorado...
    
     2,099 km² (810 mi²)
83. McElmo Creek
    McElmo Creek
    McElmo Creek is a tributary that joins the San Juan River in San Juan County, Utah. The creek's source is just east of Cortez in Montezuma County, Colorado.-See also:*List of rivers of Colorado*List of rivers of Utah...
    
     1,842 km² (711 mi²)
84. Michigan River
    Michigan River
    The Michigan River is a tributary of the North Platte River, approximately long, in north central Colorado in the United States. It drains a rural part of the eastern side of North Park in eastern Jackson County. The river issues from Michigan Lakes, a chain of alpine lakes at , along the...
    
    
85. Middle Fork Cimarron River
    Middle Fork Cimarron River
    Middle Fork Cimarron River is a tributary of the Cimarron River in Colorado. The river's source is east of Coxcomb Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the East Fork Cimarron River in Gunnison County to form the Cimarron River....
    
    
86. Middle Fork Conejos River
87. Middle Fork Elk River
    Middle Fork Elk River
    Middle Fork Elk River is a stream in Colorado. It flows from a confluence of Gilpin Creek and Gold Creek in Routt National Forest north of Steamboat Springs to a confluence with the North Fork Elk River that forms the Elk River...
    
    
88. Middle Fork Little Snake River
    Middle Fork Little Snake River
    Middle Fork Little Snake River is a tributary of the Little Snake River in Routt County, Colorado. It flows from a source near the Continental Divide in Routt National Forest to a confluence with the North Fork Little Snake River that forms the Little Snake River....
    
    
89. Middle Fork Piedra River
90. Middle Fork Purgatoire River
91. Middle Fork South Arkansas River
92. Middle Fork South Platte River
    Middle Fork South Platte River
    The Middle Fork South Platte River is a tributary of the South Platte River, approximately long, located in central Colorado in the United States...
    
    
93. Middle Fork Swan River
94. Middle Mancos River
95. Montezuma Creek 3,044 km² (1,175 mi²)
96. Muddy Creek
    Muddy Creek (Colorado)
    Muddy Creek is a tributary of the Colorado River, approximately long, in north central Colorado in the United States.It rises in northwestern Grand County, in the Routt National Forest west of Rabbit Ears Pass at the continental divide. It flows south, east, then southwest, and joins the Colorado...
    
    
97. Navajo River
    Navajo River
    Navajo River is a tributary of the San Juan River. It flows from a source in the South San Juan Wilderness of Conejos County, Colorado southwest past Chromo, Colorado...
    
    
98. North Branch Conejos River
99. North Fork Animas River
100. North Fork Apishapa River
101. North Fork Arikaree River
     North Fork Arikaree River
     The North Fork Arikaree River is a tributary of the Arikaree River in eastern Colorado. It flows from a source in western Lincoln County to a confluence with the Arikaree River in Washington County....
     
     
102. North Fork Big Thompson River
     North Fork Big Thompson River
     The North Fork Big Thompson River is a tributary of the Big Thompson River in Larimer County, Colorado. The river's source is Rowe Glacier on the north slope of Hagues Peak, in the Mummy Range of Rocky Mountain National Park. It flows through Lake Dunraven, over Lost Falls and through Glen Haven...
     
     
103. North Fork Cache la Poudre River
     North Fork Cache la Poudre River
     The North Fork Cache la Poudre River is a tributary of the Cache la Poudre River, approximately long, in north central Colorado in the United States...
     
     
104. North Fork Canadian River
105. North Fork Cimarron River
     North Fork Cimarron River
     North Fork Cimarron River is a tributary of the Cimarron River that flows from a source in Comanche National Grassland in Baca County, Colorado. It joins the Cimarron River west of Satanta in Haskell County, Kansas....
     
      4,462 km² (1,723 mi²)
106. North Fork Conejos River
107. North Fork Crystal River
108. North Fork Elk River
     North Fork Elk River
     North Fork Elk River, or North Fork Elk Creek is a tributary of the Elk River in Routt County, Colorado. It flows from a source on the northeast slopes of Big Agnes Mountain in the Sawtooth Range to a confluence with the Middle Fork Elk River that forms the Elk River....
     
     
109. North Fork Fryingpan River
110. North Fork Gunnison River
     North Fork Gunnison River
     The North Fork Gunnison River is a tributary of the Gunnison River, long, in southwestern Colorado in the United States. It drains part of the southwestern flank of the Elk Mountains northeast of Delta....
     
      2,492 km² (962 mi²)
111. North Fork Little Snake River
     North Fork Little Snake River
     North Fork Little Snake River is a tributary of the Little Snake River in Colorado and Wyoming. It flows from a source in the Medicine Bow National Forest of Carbon County, Wyoming to a confluence with the Middle Fork Little Snake River in Routt County, Colorado that forms the Little Snake...
     
     
112. North Fork Little Thompson River
113. North Fork Los Piños River
114. North Fork Michigan River
115. North Fork North Platte River
116. North Fork Piney River
117. North Fork Purgatoire River
118. North Fork Republican River
     North Fork Republican River
     The North Fork Republican River is a tributary of the Republican River. It flows eastward from a source in Yuma County, Colorado to just north of Hagler in Dundy County, Nebraska...
     
     13,172 km² (5,086 mi²)
119. North Fork Rio de los Piños
120. North Fork Smoky Hill River
     North Fork Smoky Hill River
     North Fork Smoky Hill River is a stream that flows from a source in Cheyenne County, Colorado to a confluence with the Smoky Hill River in Logan County, Kansas....
     
      1,965 km² (759 mi²)
121. North Fork Snake River
122. North Fork South Arkansas River
123. North Fork South Platte River
     North Fork South Platte River
     The North Fork South Platte River is a tributary of the South Platte River, approximately 50 miles long, in central Colorado in the United States...
     
     
124. North Fork Swan River
125. North Fork Vermejo River
     North Fork Vermejo River
     North Fork Vermejo River is a tributary of the Vermejo River. The river flows from Las Animas County, Colorado south to a confluence with Little Vermejo Creek in Colfax County, New Mexico that forms the Vermejo River....
     
     
126. North Fork West Branch Laramie River
127. North Fork West Mancos River
128. North Fork White River
     North Fork White River
     The North Fork White River is a tributary of the White River. The river's source is Wall Lake in the Flat Tops Wilderness Area of Garfield County, Colorado. It joins with the South Fork White River in Rio Blanco County to form the White River....
     
     
129. North Platte River
     North Platte River
     The North Platte River is a major tributary of the Platte River and is approximately long counting its many curves, It travels about distance. Its course lies in the U.S...
     
     80,755 km² (31,180 mi²)
130. North Saint Charles River
131. Owl Creek
132. Parachute Creek
     Parachute Creek
     Parachute Creek is a tributary of the Colorado River in Garfield County, Colorado....
     
     
133. Pawnee Creek
     Pawnee Creek
     Pawnee Creek is a tributary that joins the South Platte River in Logan County, Colorado south of Sterling. The creek's source is in Weld County at the confluence of North Pawnee Creek and South Pawnee Creek in Pawnee National Grassland....
     
      1,875 km² (724 mi²)
134. Piceance Creek
     Piceance Creek
     Piceance Creek is a tributary of the White River in Garfield County, Colorado....
     
      1,630 km² (629 mi²)
135. Piedra River 1,770 km² (683 mi²)
136. Piney River
     Piney River (Colorado)
     Piney River is a tributary of the Colorado River in Eagle County, Colorado. The river flows northwest from Upper Piney Lake in the Eagles Nest Wilderness to a confluence with the Colorado River....
     
     
137. Plateau Creek
     Plateau Creek (Colorado)
     Plateau Creek is a tributary of the Colorado River, approximately long, located in western Colorado in the United States. It drains a lush cattle ranching valley, known as the Plateau Valley, north of the Grand Mesa and east of Grand Junction....
     
     
138. Purgatoire River
     Purgatoire River
     The Purgatoire River is a river in southeastern Colorado, United States. The river is also known locally as the Purgatory River or the Picketwire River...
     
      8,923 km² (3,445 mi²)
139. Ralston Creek
     Ralston Creek (Colorado)
     Ralston Creek is a tributary of Clear Creek, approximately long, in central Colorado in the United States. It drains a suburban and urban area of the northwestern Denver Metropolitan Area. It rises in the foothills in northeastern Gilpin County, in southern Golden Gate Canyon State Park...
     
     
140. Rio Blanco
141. Rio Chama 8,204 km² (3,168 mi²)
142. Rio Chamita
143. Rio de los Piños
144. Rio Grande
     Rio Grande
     The Rio Grande is a river that flows from southwestern Colorado in the United States to the Gulf of Mexico. Along the way it forms part of the Mexico – United States border. Its length varies as its course changes...
     
     457,275 km² (176,555 mi²)
145. Rio Lado
146. Rio San Antonio
147. Roan Creek
     Roan Creek (Colorado)
     Roan Creek is a tributary of the Colorado River in Garfield County, Colorado....
     
     
148. Roaring Fork Little Snake River
     Roaring Fork Little Snake River
     Roaring Fork Little Snake River is a tributary of the Little Snake River in Colorado and Wyoming. It flows from a source in the Medicine Bow National Forest of Carbon County, Wyoming to a confluence with the Little Snake River in Routt County, Colorado....
     
     
149. Roaring Fork River
     Roaring Fork River
     Roaring Fork River is a tributary of the Colorado River, approximately long, in west central Colorado in the United States. The river drains a populated and economically vital area of the Colorado Western Slope called the Roaring Fork Valley or Roaring Fork Watershed, which includes the resort...
     
      3,766 km² (1,454 mi²)
150. Roaring River
     Roaring River (Colorado)
     The Roaring River is a tributary of the Fall River in Larimer County, Colorado. The river's source is Crystal Lake in the Mummy Range of Rocky Mountain National Park The river flows through Lawn Lake before a confluence with the Fall River in Horseshoe Park. The collapse of the Lawn Lake Dam in...
     
     
151. Rush Creek
     Rush Creek (Colorado)
     Rush Creek is a tributary of Big Sandy Creek in Colorado. It starts at the confluence of South Rush Creek and North Rush Creek in Lincoln County. The creek flows through Cheyenne County before joining Big Sandy Creek in Kiowa County....
     
      3,570 km² (1,378 mi²)
152. Saguache Creek
     Saguache Creek
     Saguache Creek is a stream in Saguache County, Colorado. The creek flows from the confluence of its North and Middle forks before joining San Luis Creek. Saguache Creek is in the San Luis Closed Basin, the largest endorheic basin in Colorado....
     
      3,482 km² (1,345 mi²)
153. Saint Charles River
     Saint Charles River (Colorado)
     Saint Charles River is a tributary of the Arkansas River that flows from a source near Saint Charles Peak in the Wet Mountains of southern Colorado. It joins the Arkansas east of Pueblo, Colorado....
     
     
154. Saint Vrain Creek 2,572 km² (993 mi²)
155. San Juan River 64,560 km² (24,927 mi²)
156. San Luis Creek
     San Luis Creek (Colorado)
     San Luis Creek is a stream that flows from a source near Poncha Pass in Saguache County, Colorado to San Luis Lake adjacent to Great Sand Dunes National Park. San Luis Lake is the sink of the San Luis Closed Basin, the largest endorheic basin in Colorado....
     
      7,000 km² (2,703 mi²)
157. San Miguel River
     San Miguel River (Colorado)
     The San Miguel River is a tributary of the Dolores River, approximately 90 mi long in southwestern Colorado in the United States...
     
      4,060 km² (1,567 mi²)
158. Sand Arroyo Creek 1,938 km² (748 mi²)
159. Sand Creek
     Sand Creek (Denver, Colorado)
     Sand Creek is a tributary that flows into the South Platte River near Commerce City, Colorado. From its source in unincorporated Arapahoe County, it flows through Aurora and Denver before joining the South Platte in Adams County....
     
      (Adams County)
160. Sand Creek (Larimer County)
161. Sidney Draw 1,949 km² (753 mi²)
162. Slate River
     Slate River (Colorado)
     Slate River is a tributary of the East River in Gunnison County, Colorado. It flows south from a source near Yule Pass in the Raggeds Wilderness to a confluence with the East River southeast of Crested Butte, Colorado....
     
     
163. Smoky Hill River
     Smoky Hill River
     The Smoky Hill River is a river in the central Great Plains of North America, running through the U.S. states of Colorado and Kansas.-Names:The Smoky Hill gets its name from the Smoky Hills region of north-central Kansas through which it flows...
     
     51,783 km² (19,994 mi²)
164. Snake River
     Snake River (Colorado)
     The Snake River is a short tributary of the Blue River, approximately 15 miles long, in central Colorado in the United States. It drains a mountainous area on the west side of the Front Range in southeastern Summit County east of Keystone....
     
     
165. South Arkansas River
     South Arkansas River
     South Arkansas River is a tributary of the Arkansas River that flows from a source near Monarch Pass in the Sawatch Range of southern Colorado. It joins the Arkansas just south of Salida, Colorado....
     
     
166. South Fork Animas River
167. South Fork Beaver Creek 1,939 km² (749 mi²)
168. South Fork Cache la Poudre River
     South Fork Cache la Poudre River
     The South Fork Cache la Poudre River is a tributary of the Cache la Poudre River in Larimer County, Colorado. The river's source is in the Mummy Range of Rocky Mountain National Park....
     
     
169. South Fork Canadian River
170. South Fork Conejos River
171. South Fork Crystal River
172. South Fork Cucharas River
173. South Fork Eagle River
     South Fork Eagle River
     South Fork Eagle River is a tributary of the Eagle River in Eagle County, Colorado. The river flows from a source east of Tennessee Pass in the White River National Forest to a confluence with the East Fork Eagle River that forms the Eagle River....
     
     
174. South Fork Elk River
     South Fork Elk River
     The South Fork Elk River is a stream in Colorado in the United States. It flows from a source near Dome Lake in Routt National Forest north of Steamboat Springs to a confluence with the Elk River....
     
     
175. South Fork Fryingpan River
176. South Fork Huerfano River
177. South Fork Little Snake River
     South Fork Little Snake River
     South Fork Little Snake River is an tributary of the Little Snake River in Routt County, Colorado. It flows north from a source in Routt National Forest near Steamboat Lake State Park to a confluence with the Little Snake River....
     
     
178. South Fork Michigan River
179. South Fork Piney River
180. South Fork Purgatoire River
181. South Fork Republican River
     South Fork Republican River
     The South Fork Republican River is a river that arises in Lincoln County, Colorado, United States, and flows east-northeastward for about through Kit Carson and Yuma Counties, Colorado, and Cheyenne County, Kansas, to a confluence with the Republican River in Dundy County, Nebraska. Bonny...
     
      7,195 km² (2,778 mi²)
182. South Fork Rio Grande
183. South Fork San Miguel River
     South Fork San Miguel River
     South Fork San Miguel River is a tributary of the San Miguel River in San Miguel County, Colorado. The river flows north from a confluence of the Lake Fork and the Howard Fork to a confluence with the San Miguel River west of Telluride....
     
     
184. South Fork South Platte River
     South Fork South Platte River
     The South Fork South Platte River is a tributary of the South Platte River, approximately long, in central Colorado in the United States. It is located near the headwaters of the South Platte in Park County, Colorado and drains part of the intermontane grassland basin of South Park...
     
     
185. South Fork Swan River
186. South Fork West Mancos River
187. South Fork White River
     South Fork White River
     The South Fork White River is a tributary of the White River. The river's source is in the Flat Tops Wilderness Area of Garfield County, Colorado. It joins with the North Fork White River in Rio Blanco County to form the White River....
     
     
188. South Platte River
     South Platte River
     The South Platte River is one of the two principal tributaries of the Platte River and itself a major river of the American Midwest and the American Southwest/Mountain West, located in the U.S. states of Colorado and Nebraska...
     
     62,738 km² (24,223 mi²)
189. Spring Creek
190. Spruce Creek
191. Swan River
     Swan River (Colorado)
     The Swan River is a short tributary of the Blue River, approximately 10 miles long, located in the Rocky Mountains of central Colorado in the United States. The river drains a mountainous area in the upper basin of the Blue River in southern Summit County. It rises in three short forks along the...
     
     
192. Tarryall Creek
     Tarryall Creek
     Tarryall Creek is a tributary of the South Platte River, approximately long, in Park County in central Colorado in the United States. It drains a rural portion of north and central South Park, an intermontane grassland in the Rocky Mountains southwest of Denver...
     
     
193. Taylor River
     Taylor River (Colorado)
     The Taylor River rises close to Castle Peak in Colorado’s Elk Mountains in the northeast part of Gunnison County, near the Continental Divide....
     
      1,258 km² (486 mi²)
194. Tomichi Creek
     Tomichi Creek
     Tomichi Creek is a tributary of the Gunnison River in Gunnison County, Colorado....
     
      2,874 km² (1,109 mi²)
195. Trinchera Creek
196. Two Butte Creek
     Two Butte Creek
     Two Butte Creek is a tributary of the Arkansas River that flows from a source near Kim, Colorado. It joins the Arkansas just south of the town of Holly....
     
      2,107 km² (814 mi²)
197. Uncompahgre River
     Uncompahgre River
     The Uncompahgre River is a tributary of the Gunnison River, approximately 75 mi long, in southwestern Colorado in the United States. Lake Como at 12,215 ft in northern San Juan County, in the Uncompahgre National Forest in the northwestern San Juan Mountains is the headwaters of the...
     
      2,921 km² (1,128 mi²)
198. Vermillion Creek
     Vermillion Creek
     Vermillion Creek is a tributary of the Green River. It flows south from Sweetwater County, Wyoming to a confluence with the Green River just north of the Gates of Lodore in Moffat County, Colorado....
     
      2,500 km² (965 mi²)
199. West Branch Laramie River
     West Branch Laramie River
     West Branch Laramie River is a tributary of the Laramie River in Larimer County, Colorado The river's source is Island Lake in the Rawah Wilderness. It flows through Carey Lake then northeast to a confluence with the Laramie River....
     
     
200. West Dolores River
     West Dolores River
     The West Dolores River is a tributary of the Dolores River, in southwestern Colorado in the United States. Its source is northeast of Mount Wilson in the Lizard Head Wilderness of Dolores County, Colorado. The river flows southwest to a confluence with the Delores in Montezuma County....
     
     
201. West Fork Animas River
202. West Fork Cimarron River
     West Fork Cimarron River
     West Fork Cimarron River is an tributary of the Cimarron River in Colorado. The river's source is west of Coxcomb Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the Cimarron River in Gunnison County....
     
     
203. West Fork Elk River
204. West Fork Encampment River
205. West Fork Little Thompson River
206. West Fork North Fork Purgatoire River
207. West Fork Rio Chama
208. West Fork San Juan River
209. West Mancos River
     West Mancos River
     West Mancos River is a tributary of the Mancos River in Montezuma County, Colorado. The river flows from the confluence of its North and South forks in the San Juan National Forest to a confluence with the East Mancos River that forms the Mancos River....
     
     
210. White River
     White River (Utah)
     The White River is a tributary of the Green River, approximately long, in the U.S. states of Colorado and Utah. Flows vary from 450 ft³/s late summers in dry years to well over 12,000 ft³/s in spring....
     
     12,989 km² (5,015 mi²)
211. White Woman Creek 3,000 km² (1,158 mi²)
212. Williams Fork (Colorado River)
     Williams Fork (Colorado River)
     The Williams Fork is a tributary of the Colorado River, approximately long, in north central Colorado in the United States. It flows through Grand County between the valleys of the Fraser River and the Blue River...
     
     
213. Williams Fork (Yampa River)
214. Willow Creek
     Willow Creek (Colorado)
     Willow Creek is a tributary of the Colorado River, approximately long, in north central Colorado in the United States.It rises in northwestern Grand County, in the Arapaho National Forest south of Willow Creek Pass at the continental divide. It flows southeast, through Willow Creek Reservoir and...
     
     
215. Wind River
216. Yampa River
     Yampa River
     The Yampa River is a tributary of the Green River, approximately 250 mi long, in the U.S. state of Colorado. It's located in the Southwestern United States...
     
     21,506 km² (8,304 mi²)
217. Yellow Creek
     Yellow Creek (Colorado)
     Yellow Creek is a tributary of the White River in Rio Blanco County, Colorado....
     
      760 km² (293 mi²)

See also

• hydrology
  Hydrology
  Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability...
  
  
  • surface-water hydrology
    Surface-water hydrology
    Surface-water hydrology is a field that encompasses all surface waters of the globe...
    
    
    • stream
      Stream
      A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...
      
      
      • river
        River
        A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...
        
        
• State of Colorado
  • Geography of Colorado
    Geography of Colorado
    The geography of the state of Colorado is diverse, encompassing both rugged mountainous terrain, vast plains, desert lands, desert canyons, and mesas. The state of Colorado is defined as the geospherical rectangle that stretches from 37°N to 41°N latitude and from 102°03'W to 109°03'W longitude . ...
    
    
    • Colorado drainage basins
      Colorado drainage basins
      The U.S State of Colorado includes the headwaters of several important rivers. The state is divided generally East to West by the Continental Divide. East of the Continental Divide, surface waters flow via the North Platte River, the South Platte River, the Republican River, the Arkansas River,...
      
      
• Wikimedia Commons: Rivers of Colorado

Tributary chart
The following tributary chart shows many important stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

s that flow through the State of Colorado including all 158 named river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

s. The chart is arranged by tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 and area of the drainage basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

. The names of the 17 Colorado rivers with a drainage basin of more than 10,000 square kilometers (3,900 sq mi) are shown in bold. Oceans and streams outside of Colorado are shown in italics.
Pacific Ocean

1. Gulf of California
   Gulf of California
   The Gulf of California is a body of water that separates the Baja California Peninsula from the Mexican mainland...
   
   
   1. Colorado River
      Colorado River
      The Colorado River , is a river in the Southwestern United States and northwestern Mexico, approximately long, draining a part of the arid regions on the western slope of the Rocky Mountains. The watershed of the Colorado River covers in parts of seven U.S. states and two Mexican states...
      
      
      1. Green River
         Green River (Utah)
         The Green River, located in the western United States, is the chief tributary of the Colorado River. The watershed of the river, known as the Green River Basin, covers parts of Wyoming, Utah, and Colorado. The Green River is long, beginning in the Wind River Mountains of Wyoming and flowing...
         
         
         1. Yampa River
            Yampa River
            The Yampa River is a tributary of the Green River, approximately 250 mi long, in the U.S. state of Colorado. It's located in the Southwestern United States...
            
            21,506 km² (8,304 mi²)
            1. Little Snake River
               Little Snake River
               The Little Snake River is a tributary of the Yampa River, approximately 150 mi long, in southwestern Wyoming and northwestern Colorado in the United States....
               
               10,629 km² (4,104 mi²)
               1. Roaring Fork Little Snake River
                  Roaring Fork Little Snake River
                  Roaring Fork Little Snake River is a tributary of the Little Snake River in Colorado and Wyoming. It flows from a source in the Medicine Bow National Forest of Carbon County, Wyoming to a confluence with the Little Snake River in Routt County, Colorado....
                  
                  
               2. Middle Fork Little Snake River
                  Middle Fork Little Snake River
                  Middle Fork Little Snake River is a tributary of the Little Snake River in Routt County, Colorado. It flows from a source near the Continental Divide in Routt National Forest to a confluence with the North Fork Little Snake River that forms the Little Snake River....
                  
                  
               3. North Fork Little Snake River
                  North Fork Little Snake River
                  North Fork Little Snake River is a tributary of the Little Snake River in Colorado and Wyoming. It flows from a source in the Medicine Bow National Forest of Carbon County, Wyoming to a confluence with the Middle Fork Little Snake River in Routt County, Colorado that forms the Little Snake...
                  
                  
               4. South Fork Little Snake River
                  South Fork Little Snake River
                  South Fork Little Snake River is an tributary of the Little Snake River in Routt County, Colorado. It flows north from a source in Routt National Forest near Steamboat Lake State Park to a confluence with the Little Snake River....
                  
                  
               5. Williams Fork
            2. Bear River
               Bear River (Colorado)
               The Bear River is a tributary of the Yampa River. Its source is in the Flat Tops Wilderness above Stillwater Reservoir in Garfield County, Colorado. The Bear River flows northeast into Routt County and joins the Yampa River just east of the town of Yampa....
               
               
            3. Elk River
               Elk River (Colorado)
               Elk River is a stream in Colorado. It flows from a confluence of the North Fork Elk River and Middle Fork Elk River in Routt National Forest north of Steamboat Springs to a confluence with the Yampa River....
               
               
               1. South Fork Elk River
                  South Fork Elk River
                  The South Fork Elk River is a stream in Colorado in the United States. It flows from a source near Dome Lake in Routt National Forest north of Steamboat Springs to a confluence with the Elk River....
                  
                  
               2. Middle Fork Elk River
                  Middle Fork Elk River
                  Middle Fork Elk River is a stream in Colorado. It flows from a confluence of Gilpin Creek and Gold Creek in Routt National Forest north of Steamboat Springs to a confluence with the North Fork Elk River that forms the Elk River...
                  
                  
               3. North Fork Elk River
                  North Fork Elk River
                  North Fork Elk River, or North Fork Elk Creek is a tributary of the Elk River in Routt County, Colorado. It flows from a source on the northeast slopes of Big Agnes Mountain in the Sawtooth Range to a confluence with the Middle Fork Elk River that forms the Elk River....
                  
                  
         2. White River
            White River (Utah)
            The White River is a tributary of the Green River, approximately long, in the U.S. states of Colorado and Utah. Flows vary from 450 ft³/s late summers in dry years to well over 12,000 ft³/s in spring....
            
            12,989 km² (5,015 mi²)
            1. Piceance Creek
               Piceance Creek
               Piceance Creek is a tributary of the White River in Garfield County, Colorado....
               
                1,630 km² (629 mi²)
            2. Yellow Creek
               Yellow Creek (Colorado)
               Yellow Creek is a tributary of the White River in Rio Blanco County, Colorado....
               
                760 km² (293 mi²)
            3. North Fork White River
               North Fork White River
               The North Fork White River is a tributary of the White River. The river's source is Wall Lake in the Flat Tops Wilderness Area of Garfield County, Colorado. It joins with the South Fork White River in Rio Blanco County to form the White River....
               
               
            4. South Fork White River
               South Fork White River
               The South Fork White River is a tributary of the White River. The river's source is in the Flat Tops Wilderness Area of Garfield County, Colorado. It joins with the North Fork White River in Rio Blanco County to form the White River....
               
               
         3. Vermillion Creek
            Vermillion Creek
            Vermillion Creek is a tributary of the Green River. It flows south from Sweetwater County, Wyoming to a confluence with the Green River just north of the Gates of Lodore in Moffat County, Colorado....
            
             2,500 km² (965 mi²)
      2. upper Colorado River
         Colorado River
         The Colorado River , is a river in the Southwestern United States and northwestern Mexico, approximately long, draining a part of the arid regions on the western slope of the Rocky Mountains. The watershed of the Colorado River covers in parts of seven U.S. states and two Mexican states...
         
         
         1. Gunnison River
            Gunnison River
            The Gunnison River is a tributary of the Colorado River, long, in the Southwest state of Colorado. It is the fifth largest tributary of the Colorado River, with a mean flow of 4320 ft³/s .-Description:...
            
            20,851 km² (8,051 mi²)
            1. Uncompahgre River
               Uncompahgre River
               The Uncompahgre River is a tributary of the Gunnison River, approximately 75 mi long, in southwestern Colorado in the United States. Lake Como at 12,215 ft in northern San Juan County, in the Uncompahgre National Forest in the northwestern San Juan Mountains is the headwaters of the...
               
                2,921 km² (1,128 mi²)
            2. Tomichi Creek
               Tomichi Creek
               Tomichi Creek is a tributary of the Gunnison River in Gunnison County, Colorado....
               
                2,874 km² (1,109 mi²)
            3. North Fork Gunnison River
               North Fork Gunnison River
               The North Fork Gunnison River is a tributary of the Gunnison River, long, in southwestern Colorado in the United States. It drains part of the southwestern flank of the Elk Mountains northeast of Delta....
               
                2,492 km² (962 mi²)
            4. Lake Fork Gunnison River
               Lake Fork Gunnison River
               Lake Fork Gunnison River or Lake Fork is a tributary of the Gunnison River in Colorado. The river's source is Sloan Lake near Handies Peak in the San Juan Mountains of Hinsdale County. Lake Fork flows through Lake San Cristobal and Lake City before a confluence with the Gunnison River in Blue...
               
               
            5. Taylor River
               Taylor River (Colorado)
               The Taylor River rises close to Castle Peak in Colorado’s Elk Mountains in the northeast part of Gunnison County, near the Continental Divide....
               
                1,258 km² (486 mi²)
            6. East River
               East River (Colorado)
               East River is a stream in central Colorado. It flows south from Emerald Lake in the Maroon Bells Wilderness to a confluence with the Taylor River that forms the Gunnison River....
               
                762 km² (294 mi²)
               1. Slate River
                  Slate River (Colorado)
                  Slate River is a tributary of the East River in Gunnison County, Colorado. It flows south from a source near Yule Pass in the Raggeds Wilderness to a confluence with the East River southeast of Crested Butte, Colorado....
                  
                  
            7. Cimarron River
               1. Little Cimarron River
                  Little Cimarron River
                  Little Cimarron River is a tributary that joins the Cimarron River in Montrose County, Colorado. The river's source is near Silver Peak in the Uncompahgre Wilderness of Hinsdale County....
                  
                  
                  1. East Fork Little Cimarron River
               2. East Fork Cimarron River
                  East Fork Cimarron River
                  East Fork Cimarron River is a tributary of the Cimarron River in Colorado. The river's source is near Wetterhorn Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the Middle Fork Cimarron River in Gunnison County to form the Cimarron River....
                  
                  
               3. Middle Fork Cimarron River
                  Middle Fork Cimarron River
                  Middle Fork Cimarron River is a tributary of the Cimarron River in Colorado. The river's source is east of Coxcomb Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the East Fork Cimarron River in Gunnison County to form the Cimarron River....
                  
                  
               4. West Fork Cimarron River
                  West Fork Cimarron River
                  West Fork Cimarron River is an tributary of the Cimarron River in Colorado. The river's source is west of Coxcomb Peak in the Uncompahgre Wilderness of Hinsdale County. It joins the Cimarron River in Gunnison County....
                  
                  
         2. Dolores River
            Dolores River
            The Dolores River is a tributary of the Colorado River, approximately 250 mi long, in the U.S. states of Colorado and Utah....
            
            11,998 km² (4,633 mi²)
            1. San Miguel River
               San Miguel River (Colorado)
               The San Miguel River is a tributary of the Dolores River, approximately 90 mi long in southwestern Colorado in the United States...
               
                4,060 km² (1,567 mi²)
               1. South Fork San Miguel River
                  South Fork San Miguel River
                  South Fork San Miguel River is a tributary of the San Miguel River in San Miguel County, Colorado. The river flows north from a confluence of the Lake Fork and the Howard Fork to a confluence with the San Miguel River west of Telluride....
                  
                  
            2. West Dolores River
               West Dolores River
               The West Dolores River is a tributary of the Dolores River, in southwestern Colorado in the United States. Its source is northeast of Mount Wilson in the Lizard Head Wilderness of Dolores County, Colorado. The river flows southwest to a confluence with the Delores in Montezuma County....
               
               
            3. Rio Lado
         3. Roaring Fork River
            Roaring Fork River
            Roaring Fork River is a tributary of the Colorado River, approximately long, in west central Colorado in the United States. The river drains a populated and economically vital area of the Colorado Western Slope called the Roaring Fork Valley or Roaring Fork Watershed, which includes the resort...
            
             3,766 km² (1,454 mi²)
            1. Crystal River
               Crystal River (Colorado)
               The Crystal River is a tributary of the Roaring Fork River, approximately 40 mi long, in western Colorado in the United States. It drains a glacial valley, called the Valley of the Coal Miners, south of Carbondale which was historically known as a center of coal mining in southwestern Colorado...
               
               
               1. North Fork Crystal River
               2. South Fork Crystal River
                  1. East Fork South Fork Crystal River
            2. Fryingpan River
               Fryingpan River
               The Fryingpan River is a tributary of the Roaring Fork River, approximately long, in west central Colorado in the United States.It rises in northeastern Pitkin County, in the White River National Forest in the Sawatch Mountains along the western side of the continental divide. It flows westward...
               
               
               1. North Fork Fryingpan River
               2. South Fork Fryingpan River
         4. Eagle River
            Eagle River (Colorado)
            The Eagle River is a tributary of the Colorado River, approximately long, in west central Colorado in the United States.It rises in southeastern Eagle County, at the continental divide, and flows northwest past Gilman, Minturn, Avon...
            
             2,515 km² (971 mi²)
            1. Gore Creek
               Gore Creek (Colorado)
               Gore Creek is a tributary of the Eagle River, approximately long, in Eagle County in central Colorado in the United States. It drains an area of the Rocky Mountains at the south end of the Gore Range through Vail Valley. It rises on the Eagle County-Summit County border along the high crest of the...
               
               
            2. East Fork Eagle River
               East Fork Eagle River
               East Fork Eagle River is an tributary of the Eagle River in Eagle County, Colorado. The river flows from a source on Chicago Ridge in the White River National Forest to a confluence with the South Fork Eagle River that forms the Eagle River....
               
               
            3. South Fork Eagle River
               South Fork Eagle River
               South Fork Eagle River is a tributary of the Eagle River in Eagle County, Colorado. The river flows from a source east of Tennessee Pass in the White River National Forest to a confluence with the East Fork Eagle River that forms the Eagle River....
               
               
         5. Blue River
            Blue River (Colorado)
            The Blue River is a tributary of the Colorado River, approximately long, in the U.S. state of Colorado.It rises in southern Summit County, on the western side of the continental divide in the Ten Mile Range, near Quandary Peak. It flows north past Blue River and Breckenridge, then through the...
            
             1,770 km² (683 mi²)
            1. Snake River
               Snake River (Colorado)
               The Snake River is a short tributary of the Blue River, approximately 15 miles long, in central Colorado in the United States. It drains a mountainous area on the west side of the Front Range in southeastern Summit County east of Keystone....
               
               
               1. North Fork Snake River
            2. Swan River
               Swan River (Colorado)
               The Swan River is a short tributary of the Blue River, approximately 10 miles long, located in the Rocky Mountains of central Colorado in the United States. The river drains a mountainous area in the upper basin of the Blue River in southern Summit County. It rises in three short forks along the...
               
               
               1. Middle Fork Swan River
               2. North Fork Swan River
               3. South Fork Swan River
         6. Little Dolores River
            Little Dolores River
            Little Dolores River is a tributary that flows into the Colorado River in Grand County, Utah from a source in Mesa County, Colorado....
            
            
         7. Fraser River
            Fraser River (Colorado)
            The Fraser River is a tributary of the Colorado River, approximately long, in north central Colorado in the United States. It drains large portion of the Middle Park basin in Grand County in the Rocky Mountains west of Boulder and southwest of Rocky Mountain National Park. It rises at the...
            
            
         8. Williams Fork
            Williams Fork (Colorado River)
            The Williams Fork is a tributary of the Colorado River, approximately long, in north central Colorado in the United States. It flows through Grand County between the valleys of the Fraser River and the Blue River...
            
            
         9. Piney River
            Piney River (Colorado)
            Piney River is a tributary of the Colorado River in Eagle County, Colorado. The river flows northwest from Upper Piney Lake in the Eagles Nest Wilderness to a confluence with the Colorado River....
            
            
            1. North Fork Piney River
            2. South Fork Piney River
               1. First Fork South Fork Piney River
         10. Parachute Creek
             Parachute Creek
             Parachute Creek is a tributary of the Colorado River in Garfield County, Colorado....
             
             
         11. Roan Creek
             Roan Creek (Colorado)
             Roan Creek is a tributary of the Colorado River in Garfield County, Colorado....
             
             
         12. Plateau Creek
             Plateau Creek (Colorado)
             Plateau Creek is a tributary of the Colorado River, approximately long, located in western Colorado in the United States. It drains a lush cattle ranching valley, known as the Plateau Valley, north of the Grand Mesa and east of Grand Junction....
             
             
         13. Muddy Creek
             Muddy Creek (Colorado)
             Muddy Creek is a tributary of the Colorado River, approximately long, in north central Colorado in the United States.It rises in northwestern Grand County, in the Routt National Forest west of Rabbit Ears Pass at the continental divide. It flows south, east, then southwest, and joins the Colorado...
             
             
         14. Willow Creek
             Willow Creek (Colorado)
             Willow Creek is a tributary of the Colorado River, approximately long, in north central Colorado in the United States.It rises in northwestern Grand County, in the Arapaho National Forest south of Willow Creek Pass at the continental divide. It flows southeast, through Willow Creek Reservoir and...
             
             
      3. San Juan River 64,560 km² (24,927 mi²)
         1. Animas River
            Animas River
            Animas River is a river in the western United States, a tributary of the San Juan River, part of the Colorado River System. The Spanish named the river "Rio de las Animas Perdidas", "River of the Lost Souls". It is also the last free-flowing river in Colorado. The river's free-flowing status...
            
             3,562 km² (1,375 mi²)
            1. Florida River
               Florida River
               Florida River is a tributary of the Animas River in La Plata County, Colorado. The river's source is Lillie Lake in the Weminuche Wilderness. It joins the Animas River south of Durango on the Southern Ute Indian Reservation near the New Mexico state line....
               
               
            2. North Fork Animas River
            3. South Fork Animas River
            4. West Fork Animas River
         2. Montezuma Creek 3,044 km² (1,175 mi²)
         3. Mancos River
            Mancos River
            Mancos River is an tributary of the San Juan River. It flows from the confluence of West Mancos River and East Mancos River near Mancos, Colorado and joins the San Juan near Four Corners Monument in New Mexico.-See also:*List of rivers of Colorado...
            
             2,099 km² (810 mi²)
            1. East Mancos River
               East Mancos River
               East Mancos River is a tributary of the Mancos River in Montezuma County, Colorado. The river flows west from a source in the La Plata Mountains to a confluence with the West Mancos River that forms the Mancos River....
               
               
               1. Middle Mancos River
            2. West Mancos River
               West Mancos River
               West Mancos River is a tributary of the Mancos River in Montezuma County, Colorado. The river flows from the confluence of its North and South forks in the San Juan National Forest to a confluence with the East Mancos River that forms the Mancos River....
               
               
               1. North Fork West Mancos River
               2. South Fork West Mancos River
         4. McElmo Creek
            McElmo Creek
            McElmo Creek is a tributary that joins the San Juan River in San Juan County, Utah. The creek's source is just east of Cortez in Montezuma County, Colorado.-See also:*List of rivers of Colorado*List of rivers of Utah...
            
             1,842 km² (711 mi²)
         5. Piedra River 1,770 km² (683 mi²)
            1. First Fork Piedra River
            2. East Fork Piedra River
            3. Middle Fork Piedra River
         6. La Plata River
         7. Navajo River
            Navajo River
            Navajo River is a tributary of the San Juan River. It flows from a source in the South San Juan Wilderness of Conejos County, Colorado southwest past Chromo, Colorado...
            
            
            1. Little Navajo River
            2. East Fork Navajo River
         8. Los Piños River
            1. North Fork Los Piños River
         9. Rio Blanco
         10. East Fork San Juan River
         11. West Fork San Juan River

Atlantic Ocean

1. Gulf of Mexico
   Gulf of Mexico
   The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...
   
   
   1. Mississippi River
      Mississippi River
      The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...
      
      
      1. Missouri River
         Missouri River
         The Missouri River flows through the central United States, and is a tributary of the Mississippi River. It is the longest river in North America and drains the third largest area, though only the thirteenth largest by discharge. The Missouri's watershed encompasses most of the American Great...
         
         
         1. Platte River
            Platte River
            The Platte River is a major river in the state of Nebraska and is about long. Measured to its farthest source via its tributary the North Platte River, it flows for over . The Platte River is a tributary of the Missouri River, which in turn is a tributary of the Mississippi River which flows to...
            
            
            1. North Platte River
               North Platte River
               The North Platte River is a major tributary of the Platte River and is approximately long counting its many curves, It travels about distance. Its course lies in the U.S...
               
               80,755 km² (31,180 mi²)
               1. Laramie River
                  Laramie River
                  The Laramie River is a tributary of the North Platte River, approximately long, in the U.S. states of Colorado and Wyoming.It rises in northern Colorado, in the Roosevelt National Forest in the Front Range, in western Larimer County...
                  
                  11,961 km² (4,618 mi²)
                  1. Sand Creek
                  2. West Branch Laramie River
                     West Branch Laramie River
                     West Branch Laramie River is a tributary of the Laramie River in Larimer County, Colorado The river's source is Island Lake in the Rawah Wilderness. It flows through Carey Lake then northeast to a confluence with the Laramie River....
                     
                     
                     1. North Fork West Branch Laramie River
               2. Encampment River
                  Encampment River
                  The Encampment River is a tributary of the North Platte River. The river's source is east of Buck Mountain in the Park Range of Jackson County, Colorado. The river flows north and passes through the town of Encampment, Wyoming before its confluence with the North Platte....
                  
                  
                  1. West Fork Encampment River
               3. Canadian River
                  Canadian River (Colorado)
                  The Canadian River is a tributary of the North Platte River, located approximately long, in Jackson County in north central Colorado in the United States...
                  
                  
                  1. North Fork Canadian River
                  2. South Fork Canadian River
               4. Michigan River
                  Michigan River
                  The Michigan River is a tributary of the North Platte River, approximately long, in north central Colorado in the United States. It drains a rural part of the eastern side of North Park in eastern Jackson County. The river issues from Michigan Lakes, a chain of alpine lakes at , along the...
                  
                  
                  1. Illinois River
                     Illinois River (Colorado)
                     Illinois River is a tributary of the Michigan River, approximately long, in Jackson County in north central Colorado. It drains part of the North Park basin south of Walden....
                     
                     
                  2. North Fork Michigan River
                  3. South Fork Michigan River
                  4. Dry Fork Michigan River
               5. North Fork North Platte River
            2. South Platte River
               South Platte River
               The South Platte River is one of the two principal tributaries of the Platte River and itself a major river of the American Midwest and the American Southwest/Mountain West, located in the U.S. states of Colorado and Nebraska...
               
               62,738 km² (24,223 mi²)
               1. Lodgepole Creek
                  Lodgepole Creek
                  Lodgepole Creek is a tributary of the South Platte River, approximately long, in the U.S. states of Wyoming, Nebraska and Colorado. Lodgepole Creek drains a basin in the interior of a low plateau which lies between the South Platte Basin and the North Platte Basin in the southeastern corner of...
                  
                   8,374 km² (3,233 mi²)
               2. Cache la Poudre River
                  Cache La Poudre River
                  The Cache la Poudre River is in the state of Colorado in the United States.Its headwaters are in the Front Range in Larimer County, in the northern part of Rocky Mountain National Park. The river descends eastward in the mountains through the Roosevelt National Forest in Poudre Canyon...
                  
                   4,959 km² (1,915 mi²)
                  1. North Fork Cache la Poudre River
                     North Fork Cache la Poudre River
                     The North Fork Cache la Poudre River is a tributary of the Cache la Poudre River, approximately long, in north central Colorado in the United States...
                     
                     
                  2. South Fork Cache la Poudre River
                     South Fork Cache la Poudre River
                     The South Fork Cache la Poudre River is a tributary of the Cache la Poudre River in Larimer County, Colorado. The river's source is in the Mummy Range of Rocky Mountain National Park....
                     
                     
                  3. Spring Creek
               3. Crow Creek
                  Crow Creek (Wyoming)
                  Crow Creek is a waterway of southeastern Wyoming and northern Colorado. Crow Creek is formed by the merger of the South Fork of Crow Creek with the Middle fork of Crow Creek, with the quick addition of the North Fork of Crow Creek about downstream. All of the major tributaries of Crow Creek begin...
                  
                   3,717 km² (1,435 mi²)
               4. Bijou Creek
                  Bijou Creek
                  Bijou Creek is a tributary of the South Platte River in Colorado. The creek flows from a source in Adams County to a confluence with the South Platte near Fort Morgan....
                  
                   3,612 km² (1,395 mi²)
               5. Beaver Creek
                  Beaver Creek (Colorado)
                  Beaver Creek is a tributary of the South Platte River in Colorado. The creek flows from a source in Elbert County to a confluence with the South Platte in Morgan County near Hillrose....
                  
                   2,939 km² (1,135 mi²)
               6. Saint Vrain Creek 2,572 km² (993 mi²)
                  1. Boulder Creek
                     Boulder Creek (Colorado)
                     Boulder Creek is a creek draining the Rocky Mountains to the west of Boulder, Colorado, as well as the city itself and surrounding plains.- Route :...
                     
                      1,160 km² (448 mi²)
                  2. Left Hand Creek
               7. Big Thompson River
                  Big Thompson River
                  The Big Thompson River is a tributary of the South Platte River, approximately 78 miles long, in the U.S. state of Colorado.- Course of the river :...
                  
                   2,149 km² (830 mi²)
                  1. Little Thompson River
                     Little Thompson River
                     The Little Thompson River is a tributary of the Big Thompson River and thence the South Platte River in the U.S. state of Colorado.The river's headwaters lie in the Roosevelt National Forest. It flows east through the foothills of the Rocky Mountains in Larimer County through the town of Berthoud,...
                     
                     
                     1. North Fork Little Thompson River
                     2. West Fork Little Thompson River
                  2. Fall River
                     Fall River (Larimer County, Colorado)
                     The Fall River is a tributary of the Big Thompson River in Larimer County, Colorado. The river's source is near the Alpine Visitor Center in Rocky Mountain National Park. It flows down a canyon and over Chasm Falls before a confluence with the Big Thompson in Estes Park....
                     
                     
                     1. Roaring River
                        Roaring River (Colorado)
                        The Roaring River is a tributary of the Fall River in Larimer County, Colorado. The river's source is Crystal Lake in the Mummy Range of Rocky Mountain National Park The river flows through Lawn Lake before a confluence with the Fall River in Horseshoe Park. The collapse of the Lawn Lake Dam in...
                        
                        
                  3. North Fork Big Thompson River
                     North Fork Big Thompson River
                     The North Fork Big Thompson River is a tributary of the Big Thompson River in Larimer County, Colorado. The river's source is Rowe Glacier on the north slope of Hagues Peak, in the Mummy Range of Rocky Mountain National Park. It flows through Lake Dunraven, over Lost Falls and through Glen Haven...
                     
                     
                  4. Aspen Brook
                     Aspen Brook (Colorado)
                     The Aspen Brook is a tributary of the Big Thompson River in Larimer County, Colorado. The stream's source is near Wind River Pass. It flows north to a confluence with the Big Thompson in Rocky Mountain National Park....
                     
                     
                     1. Wind River
                  5. Spruce Creek
                     1. Hidden River
                  6. Fish Creek
               8. Sidney Draw 1,949 km² (753 mi²)
               9. Kiowa Creek
                  Kiowa Creek (Colorado)
                  Kiowa Creek is a tributary that flows into the South Platte River in Morgan County, Colorado near Orchard. The creek's source is in the Black Forest of El Paso County, northeast of Colorado Springs, Colorado....
                  
                   1,888 km² (729 mi²)
               10. Pawnee Creek
                   Pawnee Creek
                   Pawnee Creek is a tributary that joins the South Platte River in Logan County, Colorado south of Sterling. The creek's source is in Weld County at the confluence of North Pawnee Creek and South Pawnee Creek in Pawnee National Grassland....
                   
                    1,875 km² (724 mi²)
               11. Clear Creek
                   Clear Creek (Colorado)
                   Clear Creek is a tributary of the South Platte River, approximately long, in north central Colorado in the United States. The creek flows through Clear Creek Canyon in the Rocky Mountains directly west of Denver, descending through a long gorge to emerge on the Colorado Eastern Plains where it...
                   
                    1,497 km² (578 mi²)
                   1. Ralston Creek
                      Ralston Creek (Colorado)
                      Ralston Creek is a tributary of Clear Creek, approximately long, in central Colorado in the United States. It drains a suburban and urban area of the northwestern Denver Metropolitan Area. It rises in the foothills in northeastern Gilpin County, in southern Golden Gate Canyon State Park...
                      
                      
                   2. Fall River
                      Fall River (Clear Creek County, Colorado)
                      Fall River is an tributary of Clear Creek in Clear Creek County, Colorado. It flows from a source just south of Parry Peak to a confluence with Clear Creek west of Idaho Springs....
                      
                      
               12. Cherry Creek
                   Cherry Creek (Colorado)
                   Cherry Creek is a tributary of the South Platte River, long, in Colorado in the United States.-Location:Cherry Creek rises in the high plateau, east of the Front Range, in northwestern El Paso County...
                   
                    1,050 km² (405 mi²)
               13. North Fork South Platte River
                   North Fork South Platte River
                   The North Fork South Platte River is a tributary of the South Platte River, approximately 50 miles long, in central Colorado in the United States...
                   
                   
                   1. Geneva Creek
                      Geneva Creek (Colorado)
                      Geneva Creek is a short tributary of the North Fork South Platte River, approximately long, in central Colorado in the United States. It drains part of the Rocky Mountains southwest of Denver in northern Park County. It rises at the continental divide west of Mount Bierstadt and descends through a...
                      
                      
               14. Middle Fork South Platte River
                   Middle Fork South Platte River
                   The Middle Fork South Platte River is a tributary of the South Platte River, approximately long, located in central Colorado in the United States...
                   
                   
               15. South Fork South Platte River
                   South Fork South Platte River
                   The South Fork South Platte River is a tributary of the South Platte River, approximately long, in central Colorado in the United States. It is located near the headwaters of the South Platte in Park County, Colorado and drains part of the intermontane grassland basin of South Park...
                   
                   
               16. Lone Tree Creek
                   Lone Tree Creek (Colorado)
                   Lone Tree Creek is a tributary that joins the South Platte River in Weld County, Colorado east of Greeley. The creek's source is west of Buford in Albany County, Wyoming....
                   
                   
                   1. Owl Creek
               17. Tarryall Creek
                   Tarryall Creek
                   Tarryall Creek is a tributary of the South Platte River, approximately long, in Park County in central Colorado in the United States. It drains a rural portion of north and central South Park, an intermontane grassland in the Rocky Mountains southwest of Denver...
                   
                   
               18. Sand Creek
                   Sand Creek (Denver, Colorado)
                   Sand Creek is a tributary that flows into the South Platte River near Commerce City, Colorado. From its source in unincorporated Arapahoe County, it flows through Aurora and Denver before joining the South Platte in Adams County....
                   
                   
               19. Bear Creek 339 km² (131 mi²)
               20. Big Dry Creek
                   Big Dry Creek (Littleton, Colorado)
                   Big Dry Creek is a tributary that joins the South Platte River in Littleton, Colorado. The creek's source is in Daniels Park in Douglas County....
                   
                   
               21. Little Dry Creek
         2. Kansas River
            Kansas River
            The Kansas River is a river in northeastern Kansas in the United States. It is the southwestern-most part of the Missouri River drainage, which is in turn the northwestern-most portion of the extensive Mississippi River drainage. Its name come from the Kanza people who once inhabited the area...
            
            
            1. Republican River
               Republican River
               The Republican River is a river in the central Great Plains of North America, flowing through the U.S. states of Nebraska and Kansas.-Geography:...
               
               
               1. North Fork Republican River
                  North Fork Republican River
                  The North Fork Republican River is a tributary of the Republican River. It flows eastward from a source in Yuma County, Colorado to just north of Hagler in Dundy County, Nebraska...
                  
                  13,172 km² (5,086 mi²)
               2. Arikaree River
                  Arikaree River
                  The Arikaree River is a tributary of the Republican River that starts near Limon in Lincoln County, Colorado. The river flows east into Kansas, crossing the extreme northwestern corner of that state before entering Nebraska...
                  
                   4,429 km² (1,710 mi²)
                  1. North Fork Arikaree River
                     North Fork Arikaree River
                     The North Fork Arikaree River is a tributary of the Arikaree River in eastern Colorado. It flows from a source in western Lincoln County to a confluence with the Arikaree River in Washington County....
                     
                     
               3. Frenchman Creek
                  Frenchman Creek
                  Frenchman Creek is a spring-fed waterway that begins in Phillips County, Colorado, crosses Chase and Hayes counties in Nebraska and ends at its juncture with the Republican River in Hitchcock County, Nebraska. The length of the waterway is approximately ....
                  
                   7,398 km² (2,856 mi²)
               4. Sappa Creek
                  1. Beaver Creek
                     1. South Fork Beaver Creek 1,939 km² (749 mi²)
                     2. Little Beaver Creek 1,602 km² (619 mi²)
               5. South Fork Republican River
                  South Fork Republican River
                  The South Fork Republican River is a river that arises in Lincoln County, Colorado, United States, and flows east-northeastward for about through Kit Carson and Yuma Counties, Colorado, and Cheyenne County, Kansas, to a confluence with the Republican River in Dundy County, Nebraska. Bonny...
                  
                   7,195 km² (2,778 mi²)
            2. Smoky Hill River
               Smoky Hill River
               The Smoky Hill River is a river in the central Great Plains of North America, running through the U.S. states of Colorado and Kansas.-Names:The Smoky Hill gets its name from the Smoky Hills region of north-central Kansas through which it flows...
               
               51,783 km² (19,994 mi²)
               1. Ladder Creek
                  Ladder Creek
                  Ladder Creek is a stream that flows from a source in Cheyenne County, Colorado to a confluence with the Smoky Hill River in Logan County, Kansas....
                  
                   3,645 km² (1,407 mi²)
               2. North Fork Smoky Hill River
                  North Fork Smoky Hill River
                  North Fork Smoky Hill River is a stream that flows from a source in Cheyenne County, Colorado to a confluence with the Smoky Hill River in Logan County, Kansas....
                  
                   1,965 km² (759 mi²)
      2. Arkansas River
         Arkansas River
         The Arkansas River is a major tributary of the Mississippi River. The Arkansas generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas. The river's initial basin starts in the Western United States in Colorado, specifically the Arkansas...
         
         478,501 km² (184,750 mi²)
         1. Canadian River
            Canadian River
            The Canadian River is the longest tributary of the Arkansas River. It is about long, starting in Colorado and traveling through New Mexico, the Texas Panhandle, and most of Oklahoma....
            
            122,701 km² (47,375 mi²)
            1. Vermejo River
               Vermejo River
               Vermejo River is a tributary of the Canadian River in Colfax County, New Mexico. The river flows southeast from the confluence of North Fork Vermejo River and Little Vermejo Creek to a confluence with the Canadian River south of Maxwell....
               
               
               1. North Fork Vermejo River
                  North Fork Vermejo River
                  North Fork Vermejo River is a tributary of the Vermejo River. The river flows from Las Animas County, Colorado south to a confluence with Little Vermejo Creek in Colfax County, New Mexico that forms the Vermejo River....
                  
                  
         2. Cimarron River 44,890 km² (17,332 mi²)
            1. North Fork Cimarron River
               North Fork Cimarron River
               North Fork Cimarron River is a tributary of the Cimarron River that flows from a source in Comanche National Grassland in Baca County, Colorado. It joins the Cimarron River west of Satanta in Haskell County, Kansas....
               
                4,462 km² (1,723 mi²)
               1. Sand Arroyo Creek 1,938 km² (748 mi²)
         3. Purgatoire River
            Purgatoire River
            The Purgatoire River is a river in southeastern Colorado, United States. The river is also known locally as the Purgatory River or the Picketwire River...
            
             8,923 km² (3,445 mi²)
            1. North Fork Purgatoire River
               1. West Fork North Fork Purgatoire River
            2. Middle Fork Purgatoire River
            3. South Fork Purgatoire River
         4. Huerfano River
            Huerfano River
            Huerfano River is a tributary of the Arkansas River that flows from a source near Blanca Peak in the Sangre de Cristo Mountains of Colorado. It joins the Arkansas in Pueblo County just south of the town of Boone....
            
             4,840 km² (1,869 mi²)
            1. Cucharas River
               Cucharas River
               Cucharas River is a tributary of the Huerfano River that flows from a source in Huerfano County, Colorado, southwest of the Spanish Peaks in San Isabel National Forest. The river passes through La Veta and Walsenburg before joining the Huerfano River in Pueblo County....
               
               
               1. Hill Branch Cucharas River
               2. South Fork Cucharas River
            2. South Fork Huerfano River
         5. Big Sandy Creek
            Big Sandy Creek (Colorado)
            Big Sandy Creek is a tributary of the Arkansas River noted for being the location of the Sand Creek Massacre. Big Sandy Creek starts near Peyton in El Paso County, Colorado and flows through Elbert, Lincoln, Cheyenne and Kiowa counties before it joins with the Arkansas River in Prowers county...
            
             4,825 km² (1,863 mi²)
            1. Rush Creek
               Rush Creek (Colorado)
               Rush Creek is a tributary of Big Sandy Creek in Colorado. It starts at the confluence of South Rush Creek and North Rush Creek in Lincoln County. The creek flows through Cheyenne County before joining Big Sandy Creek in Kiowa County....
               
                3,570 km² (1,378 mi²)
         6. Horse Creek
            Horse Creek (Colorado)
            Horse Creek is a tributary of the Arkansas River that flows from a source south of Calhan in the Holcolm Hills of El Paso County, Colorado. It flows east and south to a confluence with the Arkansas in Otero County west of Las Animas...
            
             3,680 km² (1,421 mi²)
         7. Apishapa River
            Apishapa River
            Apishapa River is a tributary of the Arkansas River that flows from a source near West Spanish Peak in southern Colorado. It joins the Arkansas east of Fowler, Colorado....
            
             2,798 km² (1,080 mi²)
            1. North Fork Apishapa River
         8. Fountain Creek
            Fountain Creek
            Fountain Creek is a stream in El Paso and Pueblo counties, in Colorado in the United States.-Geography:From its source near the city of Woodland Park north of Pikes Peak, the creek flows southeast through the communities of Green Mountain Falls and Chipita Park to the town of Cascade. It...
            
             2,418 km² (933 mi²)
         9. Two Butte Creek
            Two Butte Creek
            Two Butte Creek is a tributary of the Arkansas River that flows from a source near Kim, Colorado. It joins the Arkansas just south of the town of Holly....
            
             2,107 km² (814 mi²)
         10. Chico Creek
             Chico Creek
             Chico Creek is a tributary of the Arkansas River that flows from a source in El Paso County, Colorado. It joins the Arkansas in Pueblo County just west of the town of Avondale....
             
              1,934 km² (747 mi²)
         11. South Arkansas River
             South Arkansas River
             South Arkansas River is a tributary of the Arkansas River that flows from a source near Monarch Pass in the Sawatch Range of southern Colorado. It joins the Arkansas just south of Salida, Colorado....
             
             
             1. Middle Fork South Arkansas River
             2. North Fork South Arkansas River
         12. Saint Charles River
             Saint Charles River (Colorado)
             Saint Charles River is a tributary of the Arkansas River that flows from a source near Saint Charles Peak in the Wet Mountains of southern Colorado. It joins the Arkansas east of Pueblo, Colorado....
             
             
             1. North Saint Charles River
         13. East Fork Arkansas River
             East Fork Arkansas River
             East Fork Arkansas River is a tributary of the Arkansas River that flows from a source in the Mosquito Range of central Colorado. It joins the Arkansas west of Leadville, Colorado....
             
             
         14. Chalk Creek
             Chalk Creek
             Chalk Creek is a river flowing east from the Collegiate Peaks mountain range in Chaffee County, Colorado. Mount Antero borders the southern side of the river, while Mount Princeton borders the northern side. The headwaters of the river are located at the Continental Divide...
             
             
         15. Bear Creek Basin endorheic basin)
             1. Bear Creek 4,500 km² (1,737 mi²)
         16. White Woman Basin endorheic basin)
             1. White Woman Creek 3,000 km² (1,158 mi²)
   2. Rio Grande
      Rio Grande
      The Rio Grande is a river that flows from southwestern Colorado in the United States to the Gulf of Mexico. Along the way it forms part of the Mexico – United States border. Its length varies as its course changes...
      
      457,275 km² (176,555 mi²)
      1. Rio Chama 8,204 km² (3,168 mi²)
         1. Rio Chamita
         2. East Fork Rio Chama
         3. West Fork Rio Chama
      2. Conejos River
         Conejos River
         The Conejos River is a tributary of the Rio Grande, approximately long, in south-central Colorado in the United States. It drains a scenic area of the eastern San Juan Mountains west of the San Luis Valley.-Description:...
         
          2,078 km² (802 mi²)
         1. Rio San Antonio
            1. Rio de los Piños
               1. North Fork Rio de los Piños
         2. Middle Fork Conejos River
         3. North Branch Conejos River
         4. North Fork Conejos River
         5. South Fork Conejos River
         6. Adams Fork Conejos River
      3. South Fork Rio Grande
      4. Alamosa River
         Alamosa River
         The Alamosa River is a river in the southern part of the U.S. state of Colorado. It is about long, flowing roughly east through the San Luis Valley. Its watershed comprises about .The river's name means "shaded with cottonwoods" in Spanish....
         
          383 km² (148 mi²)
      5. Trinchera Creek
      6. San Luis Closed Basin endorheic basin)
         1. San Luis Creek
            San Luis Creek (Colorado)
            San Luis Creek is a stream that flows from a source near Poncha Pass in Saguache County, Colorado to San Luis Lake adjacent to Great Sand Dunes National Park. San Luis Lake is the sink of the San Luis Closed Basin, the largest endorheic basin in Colorado....
            
             7,000 km² (2,703 mi²)
            1. Saguache Creek
               Saguache Creek
               Saguache Creek is a stream in Saguache County, Colorado. The creek flows from the confluence of its North and Middle forks before joining San Luis Creek. Saguache Creek is in the San Luis Closed Basin, the largest endorheic basin in Colorado....
               
               3,482 km² (1,345 mi²)

External links

• State of Colorado website
  • Colorado Division of Natural Resources
    • Colorado Water Conservation Board
    • Colorado Division of Water Resources
    • Colorado Geological Survey
      • Major Rivers of Colorado
    • Colorado's Decision Support Systems