Clackamas 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"Two days’ journey from the Columbia, or about twenty miles beyond the entrance of the Clackamos, are the falls of the Multnomah."