The lake covers 7,850 km2 (3,030 sq mi), is 283 km (176 mi) long, has a maximum width of 50 km (31 mi), and a maximum depth of 124 m (407 ft), and holds 204 km3 (49 cu mi) of water, making it the largest and deepest lake in both Alberta and Saskatchewan, and the eighth largest in Canada.[6] Water flows northward from the lake via the Slave River and Mackenzie River systems, eventually reaching the Arctic Ocean.