Grande Ronde River
| Grande Ronde River | |
 The lower Grande Ronde in Oregon
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| Country | United States |
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| States | Oregon, Washington |
| Counties | Union and Wallowa counties in Oregon, Asotin County in Washington |
| Tributaries | |
| - left | Wenaha River |
| - right | Catherine Creek, Wallowa River, Joseph Creek |
| Cities | La Grande, Elgin |
| Source | Blue Mountains |
| - location | Elkhorn Range |
| - elevation | 7,444 ft (2,269 m) |
| - coordinates | 44°57′34″N 118°15′38″W / 44.95944°N 118.26056°W |
| Mouth | Snake River |
| - elevation | 830 ft (253 m) |
| - coordinates | 46°4′49″N 116°58′47″W / 46.08028°N 116.97972°WCoordinates: 46°4′49″N 116°58′47″W / 46.08028°N 116.97972°W |
| 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
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  Mouth of the Grande Ronde River in Washington
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The Grande Ronde River (/ɡrænd rɑːnd/ or, less commonly, /ɡrænd raʊnd/) is a tributary of the Snake River, 182 miles (293 km) long, in northeastern Oregon and southeastern Washington in the United States. It drains an area southeast of the Blue Mountains and northwest of the Wallowa Mountains, on the Columbia Plateau. It flows through the agricultural Grande Ronde Valley in its middle course and through a series of scenic canyons in its lower course.
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.
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Wikipedia