Souris River

The Souris River (rivière Souris) or Mouse River (as it is alternatively known in the U.S, a translation of its French name) is a river in central North America. Approximately 700 kilometres (430 miles) in length, it drains about 61,100 km2 (23, 600 sq mi) of land in Canada and the United States. Rising in southeastern Saskatchewan in the Yellow Grass Marshes north of Weyburn, the river wanders southeast into the U.S. through North Dakota beyond Minot to its most southern point at Velva, and then back north into Canada in southwestern Manitoba. The primary tributary in the U.S. is the Des Lacs River; the confluence is at Burlington, a few miles northwest of central Minot. Flowing northeast in Manitoba, it passes through the communities of Melita, Hartney, Souris, and Wawanesa, prior to the confluence with the Assiniboine River near Treesbank, about 40 km (25 mi) southeast of Brandon. The main tributaries of the Souris in Manitoba are the Antler River, Gainsborough Creek, and Plum Creek. The elevation at the confluence is approximately 340 m (1, 120 ft) above sea level. At the end of the last ice age, over 10,000 years ago, the rapid draining of Glacial Lake Regina eroded a large channel that is now occupied by the much smaller contemporary Souris River. Also, much of the drainage basin is fertile silt and clay deposited by another former glacial lake, Lake Souris.

Flows through: Canada, United States.

River data from Wikidata (CC0); lengths normalised to a common unit.