Mackenzie River Mackenzie River The Mackenzie River (Slavey language: Deh-Cho , "big river" or Inuvialuktun: Kuukpak , "great river"; ) is the longest river system in Canada, and has the second largest drainage basin of any North American river after the Mississippi River. The Mackenzie River flows through a vast, thinly populated region of forest and tundra entirely within the Canadian Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories. The river's main stem is long, flowing north-northwest from Great Slave Lake into the Arctic Ocean, where it forms a large delta at its mouth. Its extensive
Whitesand River (Lake Nipigon) Whitesand River (Lake Nipigon) The Whitesand River is a river in Thunder Bay District, Ontario, Canada, that flows south into the northwest side of Lake Nipigon. Another river in Thunder Bay District with the same name, Whitesand River (Hewitson River), lies further southeast and flows into Lake Superior via the Hewitson River. The river begins at Selassie Lake at an elevation of . Selassie Lake is adjacent to Haile Lake, which also flows into Lake Nipigon, but via the Pikitigushi River system. The names of the two lakes are a reference to Haile Selassie I of Ethiopia. From Selassie Lake,