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
Bear River (Great Salt Lake) passing through Evanston then weaving along the Utah-Wyoming state line as it flows north. It turns northwest into Bear Lake County, Idaho and flows through the Bear Lake Valley in Idaho, past Montpelier where it receives the short Bear Lake Outlet Canal that drains Bear Lake, which straddles the Idaho-Utah border. At Soda Springs, near the north end of the Wasatch Range, the Bear River turns abruptly south, flowing past Preston in the broad Cache Valley that extends north from Logan, Utah. It re-enters northern Utah, meandering south past Cornish and Newton. It is impounded to form the Cutler Reservoir,