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Lake · Canada

Lake Mistassini

Lake Mistassini is the largest natural lake in the Canadian province of Quebec. It is long and narrow: about 161 km from end to end, but only up to 19 km wide.

Where is Lake Mistassini?

Countries on its shores: Canada.

Middle of the lake: 50.95° N, 73.70° W

The story behind it

Lake Mistassini lies in the north of Quebec, in Canada, 372 m above sea level. Together with its islands it covers about 2 335 km²; the open water alone covers about 2 164 km². In places it is 183 m deep. Its name comes from the Cree language and means “large rock”. It probably refers to a big boulder, about 3 m high, that glaciers carried there long ago. The Cree town of Mistissini lies in the south of the lake. Many rivers flow into Lake Mistassini, and the neighbouring Lake Albanel drains into it too. The water leaves the lake through the Rupert River, which flows to James Bay. Winters here are long and cold: the lake is usually frozen from November to June. Then the whole lake is covered by a white sheet of ice.

Find it on the globe

Lake Mistassini is there as a small blue dot with its name, right on the water. From far away the planet is only a blue ball; detail arrives as you zoom in, and this one appears once you are close enough. Open it on the globe.

It sits at its real coordinates, not near them — the same numbers listed in the facts above. Switch off the layer for this kind of place and it disappears again; the buttons for that are down the right-hand edge.

Questions children ask

How big is Lake Mistassini?

With its islands, Lake Mistassini covers about 2 335 km²; the water alone covers about 2 164 km². It is about 161 km long and up to 19 km wide.

What does the name Mistassini mean?

The name comes from the Cree language and means “large rock”. It probably refers to a boulder about 3 m high that glaciers left there.

Does Lake Mistassini freeze?

Yes. The lake is usually frozen from November to June, so for more than half of the year it is covered in ice.

Where these numbers come from

Every figure on this page was checked against public reference sources before publication. Where sources genuinely disagree, the text says so.

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