Columbia Valley, Washington, United States (Google Maps ⧉, OpenStreetMap ⧉)
Referenced In
History of the Expedition Under the Command of Captains Lewis and Clark: To the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean
by Meriwether Lewis, William Clark"“This great plain or valley begins above the mouth of Quicksand river, and is about sixty miles wide in a straight line… we gave it the name of the Columbia valley.”"