The Warm Springs River is a 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...

 in northern Central Oregon

Central Oregon

Central Oregon is a geographic region in the U.S. state of Oregon and is traditionally considered to be made up of Deschutes, Jefferson, and Crook counties. Other definitions include larger areas, often encompassing areas to the north towards the Columbia River, eastward towards Burns, or south...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, which drains the east side of the Cascade Range

Cascade Range

The Cascade Range is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, and the notable volcanoes known as the High Cascades...

 and is a tributary to the Deschutes River. The watershed is approximately between Mount Jefferson

Mount Jefferson (Oregon)

Mount Jefferson is a stratovolcano in the Cascade Volcanic Arc, part of the Cascade Range, and is the second highest mountain in Oregon. Situated in the far northeastern corner of Linn County on the Jefferson County line, about east of Corvallis, Mount Jefferson is in a rugged wilderness and is...

 and Timothy Lake

Timothy Lake

Timothy Lake is a lake about southeast of Portland, Oregon, United States. It is in close proximity to Clear Lake and an impoundment of the Oak Grove Fork Clackamas River. The compacted-earth dam was built on Timothy Meadows in 1956 to regulate flow to Lake Harriet and the power plant was...

 and appears the northwestern and southwestern boundaries of the Warm Springs Indian Reservation

Warm Springs Indian Reservation

The Warm Springs Indian Reservation consists of 1,019.385 sq mi in north central Oregon, in the United States, and is occupied and governed by the Confederated Tribes of Warm Springs.-Tribes:...

 coincide with the watershed. The headwaters are less than one quarter mile from the Wasco County

Wasco County, Oregon

Wasco County is a county located in the U.S. state of Oregon. The county is named for a local tribe of Native Americans, the Wasco, a Chinook tribe who lived on the south side of the Columbia River. In 2010, its population was 25,213...

 and Clackamas County

Clackamas County, Oregon

Clackamas County is a county located in the U.S. state of Oregon. The county was named after the Native Americans living in the area, the Clackamas Indians, who were part of the Chinookan people. As of 2010, the population was 375,992...

 boundary (which follows the Cascade Crest). The river flows generally eastward, with occasional diagonals southeast or northeast. It joins the Deschutes River at river mile

River mile

In the United States, a River mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the River kilometer...

83.7 (134.7 km upstream from its mouth).