The Belle Fourche River (pronounced bel FOOSH; Lakota: Šahíyela Wakpá[1]) is a tributary of the Cheyenne River, approximately 290 miles (470 km) long, in the U.S. states of Wyoming and South Dakota.[2] It is part of the Mississippi Riverwatershed via the Cheyenne and Missouri rivers. In the latter part of the 19th century, the Belle Fourche River was known as the North Fork of the Cheyenne River.[3] Belle Fourche is a name derived from French meaning "beautiful fork".[4]
^Ullrich, Jan, ed. (2011). New Lakota Dictionary (2nd ed.). Bloomington, IN: Lakota Language Consortium. p. 861. ISBN978-0-9761082-9-0. LCCN2008922508.