CY Inbox: Lake Superior Facts

Lake Superior


Aug 13, 2020

Why it’s called Lake Superior . . . Pretty amazing.  Did you realize how big this lake is?

✔ Lake Superior contains ten percent of all the fresh water on the planet Earth.

✔ it covers 82,000 square kilometers or 31,700 square miles.

✔ the average depth is 147 meters or 483 feet.

✔ there have been about 350 shipwrecks recorded in Lake Superior

✔ Lake Superior is, by surface area, the largest lake in the world.

✔ a Jesuit priest in 1668 named it Lac Tracy, but that name was never officially adopted.

✔ it contains as much water as all the other Great Lakes combined, plus three extra Lake Erie’s!

✔ there is a small outflow from the lake at St. Mary’s River (Sault Ste Marie) into Lake Huron, but it takes almost two centuries for the water to be completely replaced.

✔ there is enough water in Lake Superior to cover all of North and South America with water one foot deep.

✔ Lake Superior was formed during the last glacial retreat, making it one of the earth’s youngest major features at only about 10,000 years old.

✔ the deepest point in the lake is 405 meters or 1,333 feet.

✔ there are 78 different species of fish that call the big lake home.

✔ the maximum wave ever recorded on Lake Superior was 9.45 meters or 31 feet high.

✔ if you stretched the shoreline of Lake Superior out to a straight line, it would be long enough to reach from Duluth to the Bahamas.

✔ Over 300 streams and rivers empty into Lake Superior with the largest source being the Nipigon River.

✔ the average underwater visibility of Lake Superior is about 8 meters or 27 feet, making it the cleanest and clearest of the Great Lakes Underwater visibility in some spots reaches 30 meters.

✔ in the summer, the sun sets more than 35 minutes later on the western shore of Lake Superior than at its southeastern edge.

✔ some of the world’s oldest rocks, formed about 2.7 billion years ago, can be found on the Ontario shore of Lake Superior.

✔ it very rarely freezes over completely, and then usually just for a few hours. Complete freezing occurred in 1962, 1979, 2003 and 2009.

Lake Superior Map 













Got something for our readers?  Send it to

Related Articles

Sylvan G3 CLZ DC: Luxury For Everyone

Sylvan’s brilliant G3 CLZ DC brings an entirely new level of performance, comfort and versatility to Canadian boaters.

By Craig Ritchie

While Canadians may have been slower to warm to pontoon boats than our southern neighbours, that’s definitely changed as we see more of them gracing our waters every year. The latest data shows pontoon boats now represent around 30% of all new boats sold in Canada and it’s easy to understand why – with their interior space and tremendous versatility, pontoons are near-perfect family runabouts.

Read More


Cruising Georgian Bay’s 30,000 Islands: Canada’s Freshwater Paradise for Boaters

By Elizabeth Wilson, “Georgian Bay Beauties” (

The Plan

It’s a beautiful morning as we perform our pre-departure checklist, fire up the engines and prepare to release our lines. And if the long-range forecast of very low winds coupled with plenty of sunshine holds, that’s exactly what we need for the areas we plan to explore on this trip! 

We are departing Midland for a week of visiting some of the islands and anchorages within Georgian Bay’s “30,000 Islands” – specifically those along the western edge. These are the less protected islands which face toward wide-open Georgian Bay, where boaters often have to depart the small craft route and work a little harder at setting the hook but are then rewarded with magnificent western views, stunning sunsets, and so much to explore! 

Read More