Hay River (Canada) border, the annual discharge is . Hay River (Canada) The Hay River (in South Slavey: "Kátå’odehche") is a large river in northern Alberta and southern Northwest Territories, Canada. It originates in the muskeg of north western Alberta, flows west to British Columbia, then curves northward and returns to Alberta, where it follows a north-northeast course towards the Northwest Territories. After passing over two main waterfalls, the Alexandra Falls and Louise Falls, it flows through the town of Hay River and discharges into the Great Slave Lake. From there, its waters are carried to the Arctic Ocean by the Mackenzie River.
Rapid River (Cree River tributary) flow via the Cree River, the Fond du Lac River and the Mackenzie River to the Arctic Ocean. Rapid River (Cree River tributary) The Rapid River is a river in northern Saskatchewan, Canada. It is part of the Mackenzie River drainage basin. The Rapid River begins at an unnamed lake at an elevation of . It travels north to Kirsch Lake at an elevation of , where it takes in several unnamed tributaries, including one from the left arriving from Halliday Lake. The river continues to Parker Lake at an elevation of where it takes in the left tributary Arnold