Averaging four to six miles wide, the mighty Mackenzie River is
Canada's largest and longest river. While working for the
Northwest Company, the Hudson's Bay Company's chief rival, the
great Canadian explorer Sir Alexander Mackenzie -using a canoe-
was the first European to navigate the river to the Arctic Ocean
in 1789. Two of the ten largest lakes in the world drain into
the Mackenzie River: Great Bear Lake and Great Slave Lake.