the bottom in deeper water. Range This species occurs throughout the western half of North America, as far north as the Mackenzie River (Canada) and the drainages of the Hudson Bay, in the Columbia River, upper Missouri River, upper Colorado River. Conservation Mountain Whitefish have a secure conservation status. In many of the larger intermountain Western rivers, Mountain Whitefish are the only native salmonid. Mountain whitefish typically occur in high abundance, in the Snake River Basin in Idaho, Mountain Whitefish abundance was found to be 1,257/100 m. References Prosopium Freshwater fish of the United States Fish of Canada Fish of the Western United States Fauna of the Northwestern United States Fauna of California Fauna of the Great Basin Fauna of the Rocky Mountains Taxa named by Charles Frédéric Girard Fish described in 1856