The lake trout or mackinaw is native in Canada and the Great Lakes from the Yukon to the Atlantic coast. The lake trout is primarily an inhabitant of large, deep, cold lakes. The lake trout is a fall spawner that spawns on rocky shoals in lakes rather than in flowing water as other Wyoming trout. Food of lake trout over twelve inches is predominantly fish. Trout, chubs, whitefish, and kokanee have been found in lake trout stomachs in Wyoming. The lake trout is an extremely long-lived fish. Fish over twenty years old have been reported.
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