Mackenzie River Great Slave Lake, at Fort Resolution, Northwest Territories. The Slave is by far the largest river flowing into the lake, with an annual flow of 108 km (87 million acre-feet). It contributes about 77% of the overall inflow, and forms a large delta where it enters the lake. Other rivers entering Great Slave Lake area the Taltson, Lockhart and Hay Rivers, the latter of which also extends into Alberta and BC. The Mackenzie River issues from the western end of Great Slave Lake about south-west of Yellowknife. The channel is initially several kilometres wide but narrows to about at Fort
Black Lake (Fond du Lac River, Saskatchewan) Black Lake (Fond du Lac River, Saskatchewan) Black Lake is a lake in the Mackenzie River drainage basin in northern Saskatchewan, Canada. It is about long, wide, has an area of , and lies at an elevation of . The primary inflows are the Chipman River, Cree River, Fond du Lac River, and Souter River; the primary outflow is Fond du Lac River, which flows via the Mackenzie River into the Arctic Ocean. The community of Black Lake is located on the northwest shore of the lake, near where the Fond du Lac River exits. The fish species in the