Rattlesnake creek, Missouri River (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"three miles further is a large creek on the south, which contained a small quantity of running water of a brackish taste. The last we called Rattlesnake creek."