Horn River formed along the middle course of the Horn River, and is followed downstream by the "Second Lake". The river turns south-west, where the "Mink Lake" is formed along its course. The Laferte River also flows into the Mink Lake. Horn River then flows south, and it receives the waters of the Bluefish River before it empties into the Mackenzie River, downstream from the Great Slave Lake), immediately upstream from Mills Lake, at an elevation of . The arch made by the river defines the "Horn Plateau", a flat elevated area that rises up to ) to the north and east,
Fond du Lac River (Saskatchewan) Fond du Lac River (Saskatchewan) The Fond du Lac River is one of the upper branches of the Mackenzie River system, draining into the Arctic Ocean, located in northern Saskatchewan, Canada. The river is long, has a watershed of , and its mean discharge is . The river begins at an elevation of at Cunning Bay on Wollaston Lake. It flows north to Hatchet Lake at an elevation of and continues to Waterfound Bay at an elevation of , where the tributary Waterfound River enters from the left. The river continues north to Kosdaw Lake at an elevation of ,