|Grande Ronde River|
The lower Grande Ronde in Oregon
|Counties||Union and Wallowa counties in Oregon, Asotin County in Washington|
|- left||Wenaha River|
|- right||Catherine Creek, Wallowa River, Joseph Creek|
|Cities||La Grande, Elgin|
|- location||Elkhorn Range|
|- elevation||7,444 ft (2,269 m) |
|- elevation||830 ft (253 m) |
GRANDE RONDE RIVER Latitude and Longitude:
|Length||182 mi (293 km) |
|Basin||4,130 sq mi (10,697 km2) |
|Discharge||for below Wenaha River, near Troy, OR|
|- average||3,034 cu ft/s (86 m3/s) |
|- max||42,200 cu ft/s (1,195 m3/s)|
|- min||344 cu ft/s (10 m3/s)|
Map of the Grande Ronde watershed
|Wikimedia Commons: Grande Ronde River|
|Designated||October 28, 1988|
- For other places with the same name, see Grande Ronde (disambiguation).
The Grande Ronde River (
The Grande Ronde River rises in the Blue Mountains near the Anthony Lakes recreation area in the Wallowa–Whitman National Forest in southwestern Union County approximately 20 miles (32 km) south of La Grande. It flows generally north along the east side of the Blue Mountains, then east, past La Grande, then generally northeast through the Grande Ronde Valley in a meandering course between the Blue Mountains and the Wallowa Mountains, receiving Catherine Creek east of La Grande.
Approximately 10 miles (16 km) northwest of Minam it receives the Wallowa River from the southeast, then receives the Wenaha River at Troy just south of the Washington border. It crosses into southeastern Washington, traversing the extreme southeast corner of the state and entering the Snake from the east, approximately 5 miles (8 km) north of the Oregon border and 15 miles (24 km) downstream from the mouth of the Salmon River. It receives Joseph Creek from the south 2 miles (3.2 km) upstream from its mouth on the Snake.
A diversion channel approximately 5 miles (8 km) long in the Grande Ronde Valley east of La Grande allows the river to bypass a long meandering loop, providing access to its water for irrigation.
In the early 19th century, the valley of the river was inhabited by Nez Perce, Umatilla, Walla Walla, and Cayuse tribes of Native Americans. Numerous archaeological sites are on the public land around the river.
The Grande Ronde River was given its name sometime before 1821 by French Canadian voyageurs working for the Montreal-based fur trading North West Company.  Grande Ronde is a French name meaning "great round". 
A portion Grande Ronde and its valley were part of the Oregon Trail. It was first used by settlers in 1844 when Moses "Black" Harris led his party to the river from Fort Hall and then turned northwest to cross the Blue Mountains. Harris' navigation would be subsequently repeated, becoming a regular part of the Oregon Trail. 
In 1988, the United States Congress designated about 44 miles (71 km) of the river, from its confluence with the Wallowa River to the Oregon–Washington border, as the Grande Ronde Wild and Scenic River, as part of the National Wild and Scenic Rivers System.
The river today is a popular destination for hunting, especially for game animals such as mule deer, elk, black bear, cougar, and bighorn sheep. Fishing, rafting and hiking are also popular along the designated Wild and Scenic portion of the river. Most of the middle reaches of the river are inaccessible to motor vehicles.
The Grande Ronde River supports populations of spring chinook salmon, summer steelhead, bull trout, mountain whitefish, as well as other species. The river has a sport steelhead fishery and has some tribal fishing for spring chinook.
- List of rivers of Oregon
- List of longest streams of Oregon
- List of rivers of Washington
- Joseph Canyon
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed May 3, 2011
- "Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging Units". U.S. Geological Survey. Retrieved 2010-08-22.
- Water Resources Data, Oregon, 2005, USGS
- U.S. Geological Survey Geographic Names Information System: Grande Ronde River, USGS, GNIS
- Google Earth elevation for GNIS coordinates.
- Grande Ronde Subbasin Plan (PDF), Northwest Power and Conservation Council
- Mackie, Richard Somerset (1997). Trading Beyond the Mountains: The British Fur Trade on the Pacific 1793-1843. Vancouver: University of British Columbia (UBC) Press. p. 26. ISBN 0-7748-0613-3.
- Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 141.
- Billington, Ray Allen (1962). The Far Western Frontier: 1830–1860. New York: Harper& Row. pp. 105–06.