List of longest rivers of Canada
Nine rivers in this list cross international boundaries or form them. Four—the Yukon, Columbia, Porcupine, and Kootenay—begin in Canada and flow into the United States. Five—the Milk, Pend d'Oreille, Saint Lawrence, Red, and Saint John—begin in the United States and flow into Canada. Of these, the Milk and the Kootenay cross the international border twice, the Milk leaving and then re-entering the United States, the Kootenay leaving and then re-entering Canada. The drainage basins of these nine rivers extend into both countries; in addition, the drainage basins of six others—the Fraser, Assiniboine, South Saskatchewan, Saskatchewan, Nelson, and Winnipeg—extend into the United States even though their main stems flow entirely within Canada.
Lakeland Provincial Park and Recreation Area
The Lakeland area straddles two drainage basins, and is thus drained by two major river systems, the Athabasca and the Beaver-Churchill. The Athabasca River drainage basin is the second largest drainage basin in Alberta. It drains 5 of the major lakes in the north-west section of the Lakeland area, including Blackett, Dabbs, Kinnaird, and McGuffin lakes, which all flow into Jackson Lake. Jackson Lake is drained by Gull Creek, which ultimately flows into the Piche River, which in turn joins the Owl River, then Lac La Biche, the La Biche River, and ultimately, into the Athabasca River and on to the Arctic Ocean.