Walla Walla River
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The Walla Walla River is a tributary of the Columbia River, joining the Columbia just above Wallula Gap in southeastern Washington in the United States. The river flows through Umatilla County, Oregon, and Walla Walla County, Washington. Its drainage basin is 1,758 square miles (4,550 km2) in area.
Confluence of the Walla Walla and the Columbia rivers.
Wind turbines over the lower Walla Walla. River depleted by irrigation water withdrawal.
The South Fork of the Walla Walla River at Harris Park, 13 miles (21 km) above Milton-Freewater, Oregon
The North Fork of the Walla Walla River above Milton-Freewater
Wallula Gap
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Wallula Gap is a large water gap of the Columbia River in the northwest United States in southeast Washington. It cuts through the Horse Heaven Hills basalt anticlines in the Columbia River Basin, just south of the confluence of the Walla Walla and Columbia rivers.
View from northeast in 2008, from Main Street in Wallula
View to the north from about the midway point within the Walulla Gap
Twin Sisters: a scabland residual of the Missoula Floods on the east bank of the Columbia River in the Wallula Gap
View from the northern end toward the south within the Walulla Gap