Photos

The name of the lake is derived from Skanadario, an Iroquois word meaning either "beautiful lake" or "sparkling water". The Canadian province of Ontario was later named after the lake.
Lake Ontario (43°30'N, 78°00'W) is the eastern-most and smallest in surface area (7,540 square miles, 19,529 km²) of the Great Lakes, although it exceeds Lake Erie in volume (393 cubic miles, 1639 km³). It is the 14th largest lake in the world and has a shoreline 712 miles (1146 km) long.
Lake Ontario has an elevation of 246 feet (75 m) above sea level. Its length is 193 miles (311 km), and its breadth is 53 miles (85 km). The average depth is 283 feet (86 m), with a maximum depth of 802 feet (244 m).
A large conurbation called the Golden Horseshoe (including major cities of Toronto and Hamilton, Ontario) is on the Canadian side at the western end of the lake. Close to 9 million people or over a quarter of Canada's population lives within the watershed of Lake Ontario.
This photo of the sunrise I took on the shore of the lake in Saddington Park in Mississauga.