Snake River

Snake River

The lower Snake River in Hells Canyon National Recreation Area, between Oregon and Idaho.

(credit: Greg Vaughn/Tom Stack & Associates)

River, northwestern U.S. It is the largest tributary of the Columbia River and one of the most important streams in the Pacific Northwest. It rises in the mountains of Yellowstone National Park in Wyoming and flows south and west through Idaho, turning north at the Oregon border to enter the Columbia in southeastern Washington after a course of 1,040 mi (1,670 km). The lower Snake flows through Hells Canyon, the deepest river gorge in North America.

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Snake River

a river in the northwestern US, rising in NW Wyoming and flowing west through Idaho, turning north as part of the border between Idaho and Oregon, and flowing west to the Columbia River near Pasco, Washington. Length: 1670 km (1038 miles)