An expansive valley between the Big Belt and Elkhorn Mountains, where the Missouri River opens into Canyon Ferry Reservoir, is Broadwater County Montana. County seat Townsend, Toston, Winston, and Radersburg boast historic buildings like the Canton Church and Canyon Ferry Mansion. There are numerous ghost towns and historic sights including ancient tipi rings, buffalo jumps, ancient petroglyphs, and Lewis and Clark sights like York Island, the Little Gates of the Mountains, and the Crimson Bluffs.