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Lake Ontario topographic map
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Lake Ontario
Lake Ontario is the easternmost of the Great Lakes and the smallest in surface area (7,340 sq mi, 18,960 km2), although it exceeds Lake Erie in volume (393 cu mi, 1,639 km3). It is the 13th largest lake in the world. When its islands are included, the lake's shoreline is 712 miles (1,146 km) long. As the last lake in the Great Lakes' hydrologic chain, Lake Ontario has the lowest mean surface elevation of the lakes at 243 feet (74 m) above sea level; 326 feet (99 m) lower than its neighbor upstream. Its maximum length is 193 statute miles (311 kilometres; 168 nautical miles), and its maximum width is 53 statute miles (85 km; 46 nmi). The lake's average depth is 47 fathoms 1 foot (283 ft; 86 m), with a maximum depth of 133 fathoms 4 feet (802 ft; 244 m). The lake's primary source is the Niagara River, draining Lake Erie, with the Saint Lawrence River serving as the outlet. The drainage basin covers 24,720 square miles (64,030 km2). As with all the Great Lakes, water levels change both within the year (owing to seasonal changes in water input) and among years (owing to longer-term trends in precipitation). These water level fluctuations are an integral part of lake ecology and produce and maintain extensive wetlands. The lake also has an important freshwater fishery, although it has been negatively affected by factors including overfishing, water pollution and invasive species.
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About this map
Name: Lake Ontario topographic map, elevation, terrain.
Location: Lake Ontario, Ontario, Canada (43.15936 -79.92529 44.29337 -76.04535)
Average elevation: 214 m
Minimum elevation: 70 m
Maximum elevation: 699 m
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Other topographic maps
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Toronto
Despite its deep ravines, Toronto is not remarkably hilly, but its elevation does increase steadily away from the lake. Elevation differences range from 76.5 metres (251 ft) above sea level at the Lake Ontario shore to 209 m (686 ft) ASL near the York University grounds in the city's north end at the…
Average elevation: 113 m
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Slate Islands
Canada > Ontario > Kenora District > Unorganized Kenora District
Average elevation: 322 m
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Pittston
Canada > Ontario > Leeds and Grenville Counties > Edwardsburgh/Cardinal
Average elevation: 82 m
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Echo Lake
Canada > Ontario > Timiskaming District > Unorganized West Timiskaming
Average elevation: 339 m
Ellery Lake
Canada > Ontario > Cochrane District > Unorganized North Cochrane
Average elevation: 350 m
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Morewood
Canada > Ontario > Stormont, Dundas and Glengarry Counties > North Dundas
Average elevation: 77 m
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Sesekinika
Canada > Ontario > Timiskaming District > Unorganized West Timiskaming
Average elevation: 320 m
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Galbraith Lake
Canada > Ontario > Kenora District > Unorganized Kenora District
Average elevation: 455 m
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La Cloche Mountains
Canada > Ontario > Sudbury District > Sables-Spanish Rivers Township
Average elevation: 337 m
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Cedar Island
Canada > Ontario > Algoma District > Plummer Additional Township
Average elevation: 216 m
Opeongo Lake Dam
Canada > Ontario > Nipissing District > Unorganized South Nipissing
Average elevation: 419 m
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Berwick
Canada > Ontario > Stormont, Dundas and Glengarry Counties > North Stormont
Average elevation: 75 m
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Loveland Lake
Canada > Ontario > Kenora District > Unorganized Kenora District
Average elevation: 426 m
Hubbard Creek
Canada > Ontario > Sudbury District > Unorganized North Sudbury
Average elevation: 457 m
Ellsmere Island
Canada > Ontario > Parry Sound District > The Archipelago Township
Average elevation: 197 m
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Kellow Lake
Canada > Ontario > Thunder Bay District > Unorganized Thunder Bay District
Average elevation: 294 m
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Apple Hill
Canada > Ontario > Stormont, Dundas and Glengarry Counties > North Glengarry
Average elevation: 90 m
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Cockburn Island
Canada > Ontario > Leeds and Grenville Counties > Elizabethtown-Kitley
Average elevation: 112 m
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Iroquois
Canada > Ontario > Stormont, Dundas and Glengarry Counties > South Dundas
Average elevation: 83 m
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St. Helena Island
Canada > Ontario > Leeds and Grenville Counties > Front of Yonge
Average elevation: 115 m
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