Located in Northern Ontario, between the Ottawa River and Georgian Bay, Lake Nipissing is the third largest lake located entirely within the boundaries of Ontario. The lake spans 65 km in an east–west direction and drains into Georgian Bay via the French River. Its name derives from an Ojibwa word meaning "little water," likely a comparison to the nearby Great Lakes, which were important trade routes for the Nbisiing (Nipissing), the First Nation indigenous to this region. Fishing is a popular activity on the lake both commercially and recreationally. Unfortunately, walleye, the lake’s dominant fish species, has declined drastically since the 1980s as a result of overfishing and ecosystem changes.
Lake St. Clair, 1,114 km, elevation 175 m, average depth 3.7 m, is bordered by the province of Ontario to the east and the state of Michigan to the west. Almost circular in shape, it has a length of 42 km and a maximum width of 39 km. It is connected to Lake Huron to the north by the St. Clair River and drains into Lake Erie to the south via the Detroit River. Lake St. Clair is part of the St. Lawrence Seaway, a significant transportation route stretching from Lake Superior through the Great Lakes to the Gulf of St. Lawrence. The cities of Windsor, Ontario, and Detroit, Michigan, are located at the southwest end of the lake, making it a popular site for recreational fishing and boating.
Nettilling Lake, 5542 km2, elevation 30 m, max length 123 km, is located toward the south end of Baffin Island in the Great Plain of the Koukdjuak, about 110 km southwest of Auyuittuq National Park and 280 km northwest of Iqaluit. The name is of Inuktitut origin but its meaning is unclear.
These 2 great journeys were first made just before the end of the 18th century, and by the same man. Alexander Mackenzie reached the mouth of the river which now bears his name in 1789, and was the first European to cross the North American continent (to Bella Coola) in 1793.