Flathead River
 The Flathead River (Salish: ntx̣ʷetkʷ ntx̣ʷe ) in the northwestern part of the U.S. state of Montana originates in the Canadian Rockies to the north of Glacier National Park and flows southwest into Flathead Lake then after a journey of 158 miles (254 km) empties into the Clark Fork. The river is part of the Columbia River drainage basin as the Clark Fork is a tributary of the Pend Oreille River a Columbia River tributary.