Walla Walla River Basin
and the Blue Mountains of Washington and Oregon.
 

The Walla Walla River basin is located in southeastern Washington and adjacent Oregon, stretching from the Blue Mountains in the east to the Columbia River on the west.  Major tributaries in the basin include the Touchet River and Mill Creek.  The basin includes parts of Walla Walla and Columbia Counties in Washington and Umatilla County in Oregon.  Whitman College is located in the City of Walla Walla.

        

    

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