 the musselshell river (assiniboine: tugÃ­ wakpÃ¡, tugÃ­ska wakpÃ¡ ) is a tributary of the missouri river,  long from its origins at the confluence of its north and south forks near martinsdale, montana to its mouth on the missouri river. it is located east of the continental divide entirely within montana in the united states. counting its pre-confluence tributaries, it measures  in length. it rises in several forks in the crazy, little belt, and castle mountains in central montana. the main branch is formed by the confluence of the north fork and south fork in meagher county, about  east of white sulphur springs, montana, just east of martinsdale, north of martinsdale reservoir, and just west of meagher county's border with wheatland county. the north fork flows south from the little belt mountains through bair reservoir, then southeast. the south fork flows northeast from the crazy mountains. from the confluence of these two waterways, the main branch flows roughly due east past two dot, harlowton, and roundup, then turns north just past melstone, and continue
Landforms_of_Golden_Valley_County,_Montana Landforms_of_Musselshell_County,_Montana Landforms_of_Petroleum_County,_Montana Landforms_of_Phillips_County,_Montana Landforms_of_Rosebud_County,_Montana Landforms_of_Wheatland_County,_Montana Rivers_of_Montana Tributaries_of_the_Missouri_River