Central Oregon Coast Range
Encyclopedia
The Central Oregon Coast Range is the middle section of the Oregon Coast Range
, in the Pacific Coast Ranges
physiographic region
, and located in the west-central portion of the state of Oregon
, United States
roughly between the Salmon River
and the Umpqua River
and the Willamette Valley
and the Pacific Ocean
. This approximately 90 mile long mountain range contains mountains as high as 4,097 feet (1,226 m) for Marys Peak
.
Portions of the range are inside the Siuslaw National Forest
and three wilderness areas exist as well: Drift Creek Wilderness
, Cummins Creek Wilderness
and Rock Creek Wilderness
.
of the Paleocene
age. It is estimated that this rock formation is up to 16 miles (26 km) thick. These formations consist mainly of pillow basalt
, large lava
flows, tuff-breccia, and sills. This part of the mountains are approximately 50 to 60 million years old. It is theorized that the source of these lava flows came from oceanic islands that formed over a tectonic hotspot. The entire Oregon Coast Range overlies a convergent tectonic margin that interacts with the Juan de Fuca Plate
that is being sub-ducted beneath the North America tectonic plate. This is the Cascadia subduction zone
that has experienced uplift for several million years. Currently it is part of a large forearc basin that extends for much of the entire Coast Range on a north-south alignment. Parts of the upper portions of the range contain continental margin
deposits from the early Eocene to Paleocene age. Portions of this include marine fossils in the geologic record. Sandstone and shale are also present in the sections of the mountains, with thickness up to 7875 ft (2,400 m). In the southern part of the range the bedrock is overlaid by Eocene
age turbidite sediments and river sediment. The active tectonic forces have created many faults and folds in the range Additionally, erosion is a major landscape-shaping force for the range. Both heavy rainfall and the resulting landslides have worked to erode and shape the mountains. Much of the landscape is dominated by steep slopes and drainages that are deeply cut into the hillsides from the erosion. Unlike many areas in North America, the mountain range did not see glaciations during the Pleistocene
age.
The Oregon Coast Range is home to over 50 mammals, 100 species of birds, and nearly 30 reptiles or amphibians that spent a significant portion of their life cycle in the mountains.
Birds living in the Central Coast Range include a variety of smaller and larger bird species. These include Winter Wrens, Chestnut-backed Chickadees, Red-breasted Nuthatch
es, Varied Thrushes, several swallow species, Red Crossbills, Evening Grosbeaks, Brown Creepers, Olive-sided Flycatchers, Hammond's Flycatchers, Gray Jays, Western Wood-Pewees, and Western Tanagers. Some of the larger species in the range include the Red-breasted Sapsucker, common ravens, peregrine falcons, the Pileated Woodpecker
, turkey vultures, wood duck, common nighthawks, and the Red-tailed Hawk. Birds in lower numbers include Vaux's Swifts, the endangered Spotted Owl
, Bald Eagles, the Downy Woodpecker, Hairy Woodpeckers, the Pine Siskin, the Hermit Warbler
, Pacific-slope Flycatchers, Golden-crowned Kinglets, and Ruffed Grouse. One of the more common avian wildlife is the American Dipper, which live mainly near rivers and streams. These birds build nests from six to nine inches (229 mm) in diameter out of moss.
The central coast range is also home to some larger animals such as deer, elk, bobcat, and bear. Bear are black bear
while deer are mule and black-tailed deer
species. Some additional mammals are Mountain Beaver
, coyote, mink, river otter, mountain lion, the common raccoon, common porcupine, brush rabbit, and skunk.
The coast range is inhabited by eleven different species of bat
s, and they account for nearly 20% of all the mammal
species in the range. Species of bats include the Yuma myotis
, silver-haired bat, big brown bat, hoary bat, and the long-eared myotis. Other mammals living in the central range include beaver
s, creeping voles, long-tailed voles, vagrant shrews, deer mice, Pacific jumping mice, Western pocket gopher, Marsh shrew, Shrew-mole, coast-mole, ermine, northern flying squirrel
, and Townsend’s chipmunk among others.
Amphibians include, but are not limited to, rough-skinned newts, northwestern salamanders, Western red-backed salamander
, Coastal tailed frog, Coastal giant salamander, red-legged frog, Southern torrent salamander, and Ensatina. Additional species include northwestern garter snake, northern alligator lizard, Pacific Tree Frog
, western pond turtles, gopher snake, ringneck snake, and western fence lizards. Fish species in the Central Coast Range include chinook salmon, steelhead, cutthroat trout, and the threatened species coho salmon
.
A large section of the range is covered by the Siuslaw National Forest. Most of the range is forested and mainly within the western hemlock vegetation zone with the overstory of the forest dominated by red alder
, western hemlock, western cedar, bigleaf maple, and Douglas-fir
trees. In these forested sections, trees include Sitka spruce, western redcedar, Douglas-fir, and western hemlock. The understory of the forest areas contain vine maple, Oregon grape, salmonberry, huckleberry, and sword fern to name a few. Other plants that grow in the region are Pacific madrone, salmonberry, Pacific silver fir, bracken fern, manzanita, thimble-berry, Pacific dogwood
, bitter cherry, snowberry, some rose species, and cascara. Additionally, various grass, sedge, and moss species are some of the other plant life growing in the mountain range.
Arthropod
s include various spiders, millipedes, collembolans, beetles, and a variety of centipedes.
to the north. Oregon Route 18 is the general divide between the two sections. On the southern end the Umpqua River and Oregon Route 38 provide the general dividing line between the Central and Southern Oregon Coast Range
.
The climate of the mountains is of the mild maritime variety. It is characterized by cool dry summers followed by mild and wet winters. Most precipitation falls in the form of rain, with snow during the winter months at the higher elevations. Annual precipitation varies from 60 to 120 inches (150–300 cm), with more in the higher elevations. The average high temperature in January is 36.3 °F (2.4 °C), and the average high in July is 61.9 °F (16.6 °C) with temperature also varying by elevation.
Drains to Willamette River
:
Drains to Pacific Ocean
:
Oregon Coast Range
The Oregon Coast Range, often called simply the Coast Range and sometimes the Pacific Coast Range, is a mountain range, in the Pacific Coast Ranges physiographic region, in the U.S. state of Oregon along the Pacific Ocean...
, in the Pacific Coast Ranges
Pacific Coast Ranges
The Pacific Coast Ranges and the Pacific Mountain System are the series of mountain ranges that stretch along the West Coast of North America from Alaska south to Northern and Central Mexico...
physiographic region
Physiographic regions of the world
The physiographic regions of the world are a means of defining the Earth's landforms into distinct regions based upon classic 1916 three-tiered approach defining divisions, provinces, and sections...
, and located in the west-central portion of the state of Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
roughly between the Salmon River
Salmon River (Lincoln County, Oregon)
The Salmon River flows from the Central Oregon Coast Range to the Pacific Ocean coast of northwest Oregon in the United States. About long, it begins and ends in Lincoln County but also flows briefly through western Polk and southern Tillamook counties....
and the Umpqua River
Umpqua River
The Umpqua River on the Pacific coast of Oregon in the United States is approximately long. One of the principal rivers of the Oregon Coast and known for bass and shad, the river drains an expansive network of valleys in the mountains west of the Cascade Range and south of the Willamette Valley,...
and the Willamette Valley
Willamette Valley
The Willamette Valley is the most populated region in the state of Oregon of the United States. Located in the state's northwest, the region is surrounded by tall mountain ranges to the east, west and south and the valley's floor is broad, flat and fertile because of Ice Age conditions...
and the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...
. This approximately 90 mile long mountain range contains mountains as high as 4,097 feet (1,226 m) for Marys Peak
Marys Peak
Marys Peak is a mountain in Benton County, Oregon, United States, just southwest of Philomath. It is the highest peak in the Oregon Coast Range...
.
Portions of the range are inside the Siuslaw National Forest
Siuslaw National Forest
Siuslaw National Forest is a national forest in western Oregon, United States. Established in 1908, the Siuslaw is made up of a wide variety of ecosystems, ranging from coastal forests to sand dunes.- Geography :...
and three wilderness areas exist as well: Drift Creek Wilderness
Drift Creek Wilderness
Drift Creek Wilderness is a wilderness area in the Siuslaw National Forest on the Oregon Coast. It was created in 1984, along with two other small wilderness areas in the Forest - Cummins Creek Wilderness and Rock Creek Wilderness. The elevation of Drift Creek ranges from , and is characterized...
, Cummins Creek Wilderness
Cummins Creek Wilderness
The Cummins Creek Wilderness is a wilderness area in the Siuslaw National Forest on the Oregon coast. It is one of three wilderness areas created in the Siuslaw in 1984, along with Drift Creek and Rock Creek...
and Rock Creek Wilderness
Rock Creek Wilderness
The Rock Creek Wilderness is a wilderness area comprising within the Siuslaw National Forest on the Oregon Coast. It was created in 1984, along with the Drift Creek Wilderness and Cummins Creek Wilderness.-Topography:...
.
Geology
The underlying rock of the Central Coast Range are the igneous rocks from the Siletz River VolcanicsSiletz River Volcanics
The Siletz River Volcanics is a sequence of basaltic pillow lavas that make up part of the Oregon Coast Range, United States. The basaltic pillow lavas originally came from submarine volcanoes that existed during the Eocene....
of the Paleocene
Paleocene
The Paleocene or Palaeocene, the "early recent", is a geologic epoch that lasted from about . It is the first epoch of the Palaeogene Period in the modern Cenozoic Era...
age. It is estimated that this rock formation is up to 16 miles (26 km) thick. These formations consist mainly of pillow basalt
Basalt
Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...
, large lava
Lava
Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...
flows, tuff-breccia, and sills. This part of the mountains are approximately 50 to 60 million years old. It is theorized that the source of these lava flows came from oceanic islands that formed over a tectonic hotspot. The entire Oregon Coast Range overlies a convergent tectonic margin that interacts with the Juan de Fuca Plate
Juan de Fuca Plate
The Juan de Fuca Plate, named after the explorer of the same name, is a tectonic plate, generated from the Juan de Fuca Ridge, and subducting under the northerly portion of the western side of the North American Plate at the Cascadia subduction zone...
that is being sub-ducted beneath the North America tectonic plate. This is the Cascadia subduction zone
Cascadia subduction zone
The Cascadia subduction zone is a subduction zone, a type of convergent plate boundary that stretches from northern Vancouver Island to northern California. It is a very long sloping fault that separates the Juan de Fuca and North America plates.New ocean floor is being created offshore of...
that has experienced uplift for several million years. Currently it is part of a large forearc basin that extends for much of the entire Coast Range on a north-south alignment. Parts of the upper portions of the range contain continental margin
Continental margin
The continental margin is the zone of the ocean floor that separates the thin oceanic crust from thick continental crust. Continental margins constitute about 28% of the oceanic area....
deposits from the early Eocene to Paleocene age. Portions of this include marine fossils in the geologic record. Sandstone and shale are also present in the sections of the mountains, with thickness up to 7875 ft (2,400 m). In the southern part of the range the bedrock is overlaid by Eocene
Eocene
The Eocene Epoch, lasting from about 56 to 34 million years ago , is a major division of the geologic timescale and the second epoch of the Paleogene Period in the Cenozoic Era. The Eocene spans the time from the end of the Palaeocene Epoch to the beginning of the Oligocene Epoch. The start of the...
age turbidite sediments and river sediment. The active tectonic forces have created many faults and folds in the range Additionally, erosion is a major landscape-shaping force for the range. Both heavy rainfall and the resulting landslides have worked to erode and shape the mountains. Much of the landscape is dominated by steep slopes and drainages that are deeply cut into the hillsides from the erosion. Unlike many areas in North America, the mountain range did not see glaciations during the Pleistocene
Pleistocene
The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....
age.
Flora and fauna
Birds living in the Central Coast Range include a variety of smaller and larger bird species. These include Winter Wrens, Chestnut-backed Chickadees, Red-breasted Nuthatch
Red-breasted Nuthatch
The Red-breasted Nuthatch, Sitta canadensis, is a small songbird. The adult has blue-grey upperparts with cinnamon underparts, a white throat and face with a black stripe through the eyes, a straight grey bill and a black crown. Its call, which has been likened to a tin trumpet, is high-pitched...
es, Varied Thrushes, several swallow species, Red Crossbills, Evening Grosbeaks, Brown Creepers, Olive-sided Flycatchers, Hammond's Flycatchers, Gray Jays, Western Wood-Pewees, and Western Tanagers. Some of the larger species in the range include the Red-breasted Sapsucker, common ravens, peregrine falcons, the Pileated Woodpecker
Pileated Woodpecker
The Pileated Woodpecker is a very large North American woodpecker, almost crow-sized, inhabiting deciduous forests in eastern North America, the Great Lakes, the boreal forests of Canada, and parts of the Pacific coast. It is also the largest woodpecker in America.Adults are long, and weigh...
, turkey vultures, wood duck, common nighthawks, and the Red-tailed Hawk. Birds in lower numbers include Vaux's Swifts, the endangered Spotted Owl
Spotted Owl
The Spotted Owl, Strix occidentalis, is a species of true owl. It is a resident species of forests in western North America, where it nests in tree holes, old bird of prey nests, or rock crevices. Nests can be between 13 and 66 yards high and usually contain two eggs...
, Bald Eagles, the Downy Woodpecker, Hairy Woodpeckers, the Pine Siskin, the Hermit Warbler
Hermit Warbler
The Hermit Warbler, Dendroica occidentalis, is a small perching bird. It is a species of New World warbler.Mature Hermit Warblers normally grow to be 4½ to 5 inches long. Hermit Warblers are dark gray in coloration on top, and white below, and their flanks are streaked with black. The wings...
, Pacific-slope Flycatchers, Golden-crowned Kinglets, and Ruffed Grouse. One of the more common avian wildlife is the American Dipper, which live mainly near rivers and streams. These birds build nests from six to nine inches (229 mm) in diameter out of moss.
The central coast range is also home to some larger animals such as deer, elk, bobcat, and bear. Bear are black bear
American black bear
The American black bear is a medium-sized bear native to North America. It is the continent's smallest and most common bear species. Black bears are omnivores, with their diets varying greatly depending on season and location. They typically live in largely forested areas, but do leave forests in...
while deer are mule and black-tailed deer
Black-tailed Deer
Two forms of black-tailed deer or blacktail deer occupying coastal temperate rainforest on North America's Pacific coast are subspecies of the mule deer. They have sometimes been treated as a species, but virtually all recent authorities maintain they are subspecies...
species. Some additional mammals are Mountain Beaver
Mountain Beaver
The Mountain Beaver is the most primitive extant rodent. Not to be confused with the North American beaver Castor canadensis, or its relative the Eurasian beaver, Castor fiber, it has several common names including Aplodontia, Boomer, Ground Bear, and Giant Mole...
, coyote, mink, river otter, mountain lion, the common raccoon, common porcupine, brush rabbit, and skunk.
The coast range is inhabited by eleven different species of bat
Bat
Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,...
s, and they account for nearly 20% of all the mammal
Mammal
Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...
species in the range. Species of bats include the Yuma myotis
Mouse-eared bat
The mouse-eared bats are a diverse and widespread genus of bats within the family Vespertilionidae.-Relationships:Myotis has historically been included in the subfamily Vespertilioninae, but was classified in its own subfamily, Myotinae, by Nancy Simmons in 1998...
, silver-haired bat, big brown bat, hoary bat, and the long-eared myotis. Other mammals living in the central range include beaver
Beaver
The beaver is a primarily nocturnal, large, semi-aquatic rodent. Castor includes two extant species, North American Beaver and Eurasian Beaver . Beavers are known for building dams, canals, and lodges . They are the second-largest rodent in the world...
s, creeping voles, long-tailed voles, vagrant shrews, deer mice, Pacific jumping mice, Western pocket gopher, Marsh shrew, Shrew-mole, coast-mole, ermine, northern flying squirrel
Northern Flying Squirrel
The Northern flying squirrel is one of two species of the genus Glaucomys, the only flying squirrels found in North America . Unlike most members of their family, flying squirrels are strictly nocturnal...
, and Townsend’s chipmunk among others.
Amphibians include, but are not limited to, rough-skinned newts, northwestern salamanders, Western red-backed salamander
Woodland salamander
Woodland salamanders are lungless salamanders of the genus Plethodon. They are so named due to their habitat, woodlands, and the fact that they have no aquatic larval stage. Eggs are laid underneath a stone or log and young hatch in the adult form....
, Coastal tailed frog, Coastal giant salamander, red-legged frog, Southern torrent salamander, and Ensatina. Additional species include northwestern garter snake, northern alligator lizard, Pacific Tree Frog
Pacific Tree Frog
The Pacific Tree Frog has a range from the West Coast of the United States to British Columbia, in Canada. They live from sea level to more than 10,000 feet in many types of habitats, reproducing in aquatic settings. They are the only frogs that go "ribbit"...
, western pond turtles, gopher snake, ringneck snake, and western fence lizards. Fish species in the Central Coast Range include chinook salmon, steelhead, cutthroat trout, and the threatened species coho salmon
Coho salmon
The Coho salmon, Oncorhynchus kisutch, is a species of anadromous fish in the salmon family. Coho salmon are also known as silver salmon or "silvers". It is the state animal of Chiba, Japan.-Description:...
.
A large section of the range is covered by the Siuslaw National Forest. Most of the range is forested and mainly within the western hemlock vegetation zone with the overstory of the forest dominated by red alder
Red Alder
Alnus rubra, the Red alder, is a deciduous broadleaf tree native to western North America.-Description:It is the largest species of alder in North America and one of the largest in the world, reaching heights of 20–35 m. The official tallest red alder stands 32 meters tall in Clatsop County, Oregon...
, western hemlock, western cedar, bigleaf maple, and Douglas-fir
Douglas-fir
Douglas-fir is one of the English common names for evergreen coniferous trees of the genus Pseudotsuga in the family Pinaceae. Other common names include Douglas tree, and Oregon pine. There are five species, two in western North America, one in Mexico, and two in eastern Asia...
trees. In these forested sections, trees include Sitka spruce, western redcedar, Douglas-fir, and western hemlock. The understory of the forest areas contain vine maple, Oregon grape, salmonberry, huckleberry, and sword fern to name a few. Other plants that grow in the region are Pacific madrone, salmonberry, Pacific silver fir, bracken fern, manzanita, thimble-berry, Pacific dogwood
Pacific Dogwood
The Pacific Dogwood, Cornus nuttallii , is a species of dogwood native to western North America from lowlands of southern British Columbia to mountains of southern California. An inland population occurs in central Idaho. Cultivated examples are found as far north as Haida Gwaii...
, bitter cherry, snowberry, some rose species, and cascara. Additionally, various grass, sedge, and moss species are some of the other plant life growing in the mountain range.
Arthropod
Arthropod
An arthropod is an invertebrate animal having an exoskeleton , a segmented body, and jointed appendages. Arthropods are members of the phylum Arthropoda , and include the insects, arachnids, crustaceans, and others...
s include various spiders, millipedes, collembolans, beetles, and a variety of centipedes.
Location and climate
The range begins around the Salmon River with the Northern Oregon Coast RangeNorthern Oregon Coast Range
The Northern Oregon Coast Range is the northern section of the Oregon Coast Range, in the Pacific Coast Ranges physiographic region, located in the northwest portion of the state of Oregon, United States. This section of the mountain range, part of the Pacific Coast Ranges, contains peaks as high...
to the north. Oregon Route 18 is the general divide between the two sections. On the southern end the Umpqua River and Oregon Route 38 provide the general dividing line between the Central and Southern Oregon Coast Range
Southern Oregon Coast Range
The Southern Oregon Coast Range is the southernmost section of the Oregon Coast Range, in the Pacific Coast Ranges, located in the southwest portion of the state of Oregon, United States roughly between the Umpqua River and the middle fork of the Coquille River, beyond which are the Klamath...
.
The climate of the mountains is of the mild maritime variety. It is characterized by cool dry summers followed by mild and wet winters. Most precipitation falls in the form of rain, with snow during the winter months at the higher elevations. Annual precipitation varies from 60 to 120 inches (150–300 cm), with more in the higher elevations. The average high temperature in January is 36.3 °F (2.4 °C), and the average high in July is 61.9 °F (16.6 °C) with temperature also varying by elevation.
Peaks
All peaks in the range over 3000 feet (914.4 m) in elevation.| Mountain Name | Elevation | County | |
|---|---|---|---|
| feet | metres | ||
| Marys Peak Marys Peak Marys Peak is a mountain in Benton County, Oregon, United States, just southwest of Philomath. It is the highest peak in the Oregon Coast Range... |
4097 | 1,248.8 | Benton |
| Grass Mountain | 3563 | 1,086 | Benton |
| Laurel Mountain | 3553 | 1,083 | Polk |
| Prairie Peak | 3412 | 1,040 | Benton |
| Saddle Bag Mountain | 3386 | 1,032.1 | Lincoln |
| Fanno Peak | 3317 | 1,011 | Polk |
| Riley Peak | 3294 | 1,004 | Polk |
| Old Blue Mountain | 3291 | 1,003.1 | Benton |
| Prairie Mountain | 3287 | 1,001.9 | Benton |
| Bald Mountain | 3215 | 979.9 | Polk |
| Condenser Peak | 3058 | 932.1 | Polk |
Rivers
The following rivers have portions of their headwaters in the Central Oregon Coast Range:Drains to Willamette River
Willamette River
The Willamette River is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States...
:
- Long Tom RiverLong Tom RiverThe Long Tom River is a tributary of the Willamette River in western Oregon in the United States. It drains an area at the south end of the Willamette Valley between Eugene and Corvallis....
- Luckiamute RiverLuckiamute RiverThe Luckiamute River is a tributary of the Willamette River, about long, in western Oregon in the United States. It drains an area of Central Oregon Coast Range and the western Willamette Valley northwest of Corvallis....
- Marys RiverMarys RiverMarys River is a tributary of the Willamette River in the U.S. state of Oregon. From its source at the confluence of its east and west forks near Summit, it flows generally southeast from the Central Oregon Coast Range to Corvallis.-Name:...
Drains to Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...
:
- Alsea RiverAlsea RiverThe Alsea River flows from Alsea, an unincorporated community in the coastal mountains of the U.S. state of Oregon, to the Pacific Ocean near the city of Waldport. It begins at the confluence of the North Fork Alsea River and the South Fork Alsea River and ends in Alsea Bay, a wide estuary at...
- D RiverD RiverThe D River is a river in Lincoln City, Oregon, United States. Proclaimed the "shortest river in the world" by the State of Oregon, it was listed in the Guinness World Records as the world's shortest river at . This title was lost in 1989 when Guinness named the Roe River in Montana as the world's...
- Little Nestucca RiverLittle Nestucca RiverThe Little Nestucca River is a river, approximately 20 mi long, on the Pacific coast of northwest Oregon in the United States. It drains an area of the Central Oregon Coast Range west of the Willamette Valley....
- Salmon RiverSalmon River (Lincoln County, Oregon)The Salmon River flows from the Central Oregon Coast Range to the Pacific Ocean coast of northwest Oregon in the United States. About long, it begins and ends in Lincoln County but also flows briefly through western Polk and southern Tillamook counties....
- Siletz RiverSiletz RiverThe Siletz River flows about to the Pacific Ocean through coastal mountains in the U.S. state of Oregon. Formed by the confluence of its north and south forks near Valsetz in Polk County, it winds through the Central Oregon Coast Range. The river, draining a watershed of , empties into Siletz Bay,...
- Siltcoos RiverSiltcoos RiverThe Siltcoos River is a short river on the central Oregon coast. It begins at Siltcoos Lake and drains mostly westward to the Pacific Ocean a direct distance of 2.3 miles but approximately 3 meandering river miles...
- Siuslaw RiverSiuslaw RiverThe Siuslaw River is a river, approximately 110 mi long, along the Pacific coast of Oregon in the United States. It drains an area of approximately in the Central Oregon Coast Range southwest of the Willamette Valley and north of the watershed of the Umpqua River.It rises in the mountains...
- Smith RiverSmith River (Oregon)Smith River is a tributary of the Umpqua River in the U.S. state of Oregon. It drains of the Central Oregon Coast Range between the watershed of the Umpqua to the south and the Siuslaw River to the north...
- Umpqua RiverUmpqua RiverThe Umpqua River on the Pacific coast of Oregon in the United States is approximately long. One of the principal rivers of the Oregon Coast and known for bass and shad, the river drains an expansive network of valleys in the mountains west of the Cascade Range and south of the Willamette Valley,...
- Yachats RiverYachats RiverThe Yachats River is a short river on the central Oregon coast, about west-north-west of Eugene. The name is the native name meaning at the foot of the mountain....
- Yaquina RiverYaquina RiverThe Yaquina River is a river, approximately 50 mi long, on the Pacific coast of Oregon in the United States. It drains an area of the Central Oregon Coast Range west of the Willamette Valley near Newport....