EntityQ3565546· pop 7· linked from 60 articlesWallula GapSign in to savelarge water gap of the Columbia River through basalt anticlines in the U.S. state of WashingtonConnectionsMissoula FloodsEntityOkanogan-Wenatchee National ForestEntityColumbia BasinEntityUnited StatesCountryIdahoEntityWashingtonEntitygeographic coordinate systemEntityInternational Standard Book NumberEntityWayback MachineEntitybasaltEntityColumbia RiverEntityMioceneEntityFederal Government of the United StatesEntitySnake RiverEntityKennewickEntityOlympic National ParkEntityPacific NorthwestEntityanticlineEntityLewis and Clark ExpeditionEntitylist of national parks of the United StatesEntityCategoriesColumbia RiverGeology of Washington (state)Landforms of Benton County, WashingtonLandforms of Walla Walla County, WashingtonNational Natural Landmarks in Washington (state)Valleys of Washington (state)Water gaps of Washington (state)