Great Slave Lake
Great Slave Lake, located in Canada's Northwest Territories, 250 mi (400 km) east of the Rocky Mountains. Fed mainly by the Slave River and marking the beginning of the Mackenzie River, the lake is one of America's largest and the deepest in North America—2,015 ft (615 m). It covers an area of 10,980 sq mi (28,438 sq km). The name was derived form the tribe called the Slave, who originally inhabited the area. Small settlements around the lake are supported by fishing, lumbering, and the mining and smelting of lead, zinc, and gold ores.