The walleye is a freshwater resident that will only rarely wander into brackish waters. As such, it is a very successful species and ranges from Quebec throughout much of the eastern United States, all the way to the Gulf coast in Alabama. Although the walleye does not flourish in Labrador and the Atlantic provinces, its range includes areas of Quebec, Ontario and the prairie provinces and even a northeasterly portion of British Columbia and the Northwest Territories. The walleye has established a strong presence in the Northwest Territories in a broad belt following the Mackenzie River, Great Bear Lake and Great Slave Lake.