Southmountain Creek, Missouri River, 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 miles further a small river: this falls in on the south, is forty yards wide, and discharges a handsome stream of water; its bed rocky with gravel and sand, and the banks high: we called it Southmountain creek, as from its direction it seemed to rise in a range of mountains about fifty or sixty miles to the S.W. of its entrance."