The Lesser Slave Watershed

 Lesser Slave Watershed 


Lesser Slave Lake (LSL) is the third largest lake in the province, a popular tourist destination and a recognized biologically significant area for bird life. The lake is a source of water for agriculture, forestry, and recreation/tourism, domestic and municipal uses. It supports major sport, commercial and domestic fisheries.

There are several beaches, campsites, recreation areas, cottages and two large provincial parks around the lake. Communities located on the shores of the lake include the Town of Slave Lake, the village of Kinuso, the hamlets of Grouard, Joussard, Faust and Canyon Creek and the First Nation communities of Kapawe’no, Sucker Creek, Driftpile, Swan River, and Sawridge.

Lesser Slave Lake has a surface area of approximately 1,150km2 and has a drainage area of approximately 12,700 km2. Much of the inflow water enters the western end of the lake at Buffalo Bay via the South Heart River and the East and West Prairie Rivers.

On the southern shore of Lesser Slave Lake, the three largest tributaries are the Driftpile, Swan and Assineau rivers, which drain the southern part of the watershed. Many small creeks and intermittent streams also flow into the lake. The outflow to the Lesser Slave River is located at the lake’s east end. The Lesser Slave River joins the Athabasca River about 75 km downstream of the outlet.


 Over the years the Government of Alberta has commissioned many technical studies about our watershed.

Click the titles to download the full reports.