Grande Ronde River

For other places with the same name, see Grande Ronde (disambiguation).

The Grande Ronde River ( or, less commonly, ) is a tributary of the Snake River, 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.