Lake Athabasca << `ath` uh BAS kuh >> is the fourth largest lake entirely within Canada’s borders. Its area is 3,064 square miles (7,935 square kilometers). About two-thirds of the lake lies in Saskatchewan, and the rest in Alberta. The Athabasca River flows into the southwestern tip of the lake, and the Slave River discharges from the same tip. During the breeding season, many Canada geese nest along Lake Athabasca’s low, sandy shores. The south-central shore has a large sand dune area. Wood Buffalo National Park borders the lake.
