South Fork Umatilla River

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South Fork Umatilla River
Name origin:Native American (Indian) name for the river [1]
Country United States
State Oregon
County Umatilla
Source Blue Mountains
 - location Umatilla National Forest
 - elevation4,865 ft (1,483 m) [2]
 - coordinates 45°35′44″N118°13′07″W / 45.59556°N 118.21861°W / 45.59556; -118.21861   [3]
Mouth Umatilla River
 - locationnear Graves Butte
 - elevation2,326 ft (709 m) [3]
 - coordinates 45°43′32″N118°11′18″W / 45.72556°N 118.18833°W / 45.72556; -118.18833 Coordinates: 45°43′32″N118°11′18″W / 45.72556°N 118.18833°W / 45.72556; -118.18833   [3]
USA Oregon location map.svg
Red pog.svg
Location of the mouth of the South Fork Umatilla River in Oregon

The South Fork Umatilla River is a tributary of the Umatilla River in Umatilla County in the U.S. state of Oregon. [3] Its headwaters lie in the Umatilla National Forest in the Blue Mountains of northeastern Oregon near Pileup Saddle and Black Mountain. The South Fork flows generally north between Goodman Ridge and Bobsled Ridge to meet the North Fork Umatilla River near Graves Butte. Together the forks form the main stem Umatilla. [4]

Umatilla River tributary of the Columbia River in Oregon

The Umatilla River is an 89-mile (143 km) tributary of the Columbia River in the U.S. state of Oregon. Draining a basin of 2,450 square miles (6,300 km2), it enters the Columbia near the city of Umatilla in the northeastern part of the state. In downstream order, beginning at the headwaters, major tributaries of the Umatilla River are the North Fork Umatilla River and the South Fork Umatilla River, then Meacham, McKay, Birch, and Butter creeks.

Umatilla County, Oregon county in Oregon, USA

Umatilla County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 75,889. The county seat is Pendleton, but the largest city is Hermiston. The county is named for the Umatilla River.

U.S. state constituent political entity sharing sovereignty as the United States of America

In the United States, a state is a constituent political entity, of which there are currently 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory and shares its sovereignty with the federal government. Due to this shared sovereignty, Americans are citizens both of the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons restricted by certain types of court orders. Four states use the term commonwealth rather than state in their full official names.

Named tributaries of the South Fork from source to mouth are Shimmiehorn, Thomas, and Buck creeks, which all enter from the right. The North Fork also enters from the right. [4]

The Umatilla Forks Campground and Day Use Area lies near the confluence of the forks. Open from June through September, it has campsites, picnic tables, toilets, drinking water, and parking spaces. [5] Forest Road 32 runs along the lower river below the mouth of Thomas Creek. [4]

See also

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References

  1. ↑ McArthur, Lewis A.; McArthur, Lewis L. (2003) [1928]. Oregon Geographic Names (7th ed.). Portland: Oregon Historical Society Press. p. 981. ISBN   0-87595-277-1.
  2. ↑ Source elevation derived from Google Earth search using GNIS source coordinates.
  3. 1 2 3 4 "South Fork Umatilla River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved December 20, 2015.
  4. 1 2 3 "United States Topographic Map". United States Geological Survey. Retrieved December 20, 2015– via Acme Mapper.
  5. ↑ "Umatilla Forks Campground". United States Forest Service. Retrieved December 20, 2015.
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