Quathlapotle Island, Columbia River, Oregon, 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"and coasting along this island, which after the nation we called Quathlapotle island, encamped for this night in a small prairie on the north side of the Columbia, having made by estimate nineteen miles."