What river begins in Lewis and Clark County outside of Missoula, Montana?
Missoula, Montana Missoula is a city in the U.S. state of Montana and is the county seat of Missoula County. It is located along the Clark Fork River near its confluences with the Bitterroot and Blackfoot Rivers in western Montana and at the convergence of five mountain ranges, thus is often described as the "hub of five valleys". In 2016 , the United States Census Bureau estimated the city's population at 72,364 and the population of the Missoula Metropolitan Area at 116,130. In the 1990s, Missoula overtook GreatFalls as Montana’s second‑largest city, behind Billings. Missoula is home to the University of Montana, a public research university.
Little Willamette River The Little Willamette River is a minor tributary of the Willamette River in Linn County in the U.S. state of Oregon. It begins in a gravel pit slightly east of the main stem in a bend of the larger river west of Albany. Flowing generally northeast and roughly parallel to the main stem for about 3 mi , it enters the Willamette about 121.5 mi from the larger river's mouth on the Columbia River.