Long Creek (Saskatchewan)

Long Creek
Long Creek in Saskatchewan
The Red River drainage basin, with the Souris River highlighted
Location in Saskatchewan Show map of Canada Long Creek (Saskatchewan) (Saskatchewan) Show map of Saskatchewan
Location
Countries	Canada  United States
Provinces	Saskatchewan
State	North Dakota
Towns	Radville, Sk
Physical characteristics
Source	near Forward and Khedive
• location	Saskatchewan
• coordinates	49°37′04″N 104°28′40″W / 49.6178°N 104.4778°W / 49.6178; -104.4778
Mouth	Souris River
• location	Saskatchewan
• coordinates	49°07′00″N 102°59′24″W / 49.1168°N 102.9900°W / 49.1168; -102.9900
Discharge
• location	Boundary Dam, south of Estevan
Basin features
River system	Red River drainage basin
Tributaries
• left	Gibson Creek
• right	Larson Reservoir

Long Creek is a river^[1] in central North America that begins in Saskatchewan, flows south-east into North Dakota,^[2] and then flows back north into Saskatchewan. It is a tributary of the Souris River.^[3] The Souris River drains into the Assiniboine River, which is part of the Red River drainage basin in a region called the Prairie Pothole Region of North America, which extends throughout three Canadian provinces and five U.S. states. It is also within Palliser's Triangle and the Great Plains ecoregion.^[4] In 1957, a dam was built on Long Creek near where it meets the Souris River to create Boundary Dam Reservoir.

In 1873, the Boundary Commission set out from Pembina, Dakota Territory to survey the Canada–United States border. The route used by the commission followed several rivers near the border, including Long Creek. In 1874, the North-West Mounted Police followed the same route along Long Creek on their March West to deal with the Cypress Hills Massacre.