Which Great Lake goes to the ocean?

Lake Erie drains into Lake Ontario via the Niagara River. The entire system flows to the Atlantic Ocean via the St. Lawrence River. As it flows from its westernmost point in Duluth, Minnesota to the Atlantic Ocean, the waterway drops in elevation approximately 600 feet.



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The Great Lakes are freshwater ecosystems. Traditionally, Lake Michigan, for example, has been a very low-salt lake, with levels around one milligram of chloride per liter of water. Over the years, due to our increased salt use, that level has steadily but gradually climbed up to 15 milligrams per liter.

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The five Great Lakes - Superior, Huron, Michigan, Erie and Ontario - span a total surface area of 94,600 square miles and are all connected by a variety of lakes and rivers, making them the largest freshwater system in the world.

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The Great Lakes are fascinating and a dream come true for swimmers. Yes, we can all swim in the Great Lakes. It's even possible to swim in all five Great Lakes in less than 24 hours!

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While there have been past “sightings,” most have turned out to be pranks or misidentifications. The reality is that the largest of the Great Lakes (Lake Superior and Michigan) are extremely deep lakes that are too cold for sharks.

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The average underwater visibility of Lake Superior is about 8 metres or 27 feet, making it the cleanest and clearest of the Great Lakes.

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Currents in Lake Erie can be dangerous! Any current flowing faster than 2 mph is considered dangerous. Dangerous currents can exceed 5 mph — faster than an Olympic swimmer can swim.

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Lake Superior is the world's largest freshwater lake by area (31,700 mi2 /82,100 km2). It is also the coldest and deepest of the Great Lakes, with a maximum depth of 406 meters (1,332 feet). By most measures, it is the healthiest of all the Great Lakes.

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The Great Lakes could be considered a failed ocean. They are in a place where rifting started to create a new ocean, but it never got connected to the ocean system (and flooded), and that was still the case when the rifting eventually stopped. Those rifts were then further (much later) excavated by glaciers.

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Although small in volume, Lake Erie is a thriving, productive environment.

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Why is Lake Erie so important? Erie is the most biologically productive and diverse of all the Great Lakes due to its warm shallow waters. Alongside this astounding biodiversity, more than 11 million people get their drinking water from the Lake Erie watershed.

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There is an abundance of life and different creatures you might find in Lake Michigan. Whales just aren't one of them. See all of the animals you can find in the lake here.

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Lawrence Seaway is a deep draft waterway extending 3,700 km (2,340 miles) from the Atlantic Ocean to the head of the Great Lakes, in the heart of North America.

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These lakes are the perfect backdrop for swimming, boating, and other water-related activities. But there can be more danger in these Great Lakes waves than what you'd find in the ocean. The Great Lakes are more than capable of generating waves over 10 feet high, despite being smaller than our oceans.

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Alligators are rarely found in the Great Lakes. Although some alligators thrive in freshwater, it's just too cold in the north for them to survive. They don't typically live farther north than North Carolina. It's unclear how the alligator arrived to Lake Michigan.

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Lake sturgeons are the biggest fish in the Great Lakes.

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