What is the deepest lake in the US?

At 1,943 feet (592 meters), Crater Lake is the deepest lake in the United States and one of the deepest in the world. The depths were first explored thoroughly in 1886 by a party from the U.S. Geological Survey.



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Situated in south-east Siberia, the 3.15-million-ha Lake Baikal is the oldest (25 million years) and deepest (1,700 m) lake in the world. It contains 20% of the world's total unfrozen freshwater reserve.

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Top 5 Deepest Lakes in the U.S.
  • Crater Lake, Oregon (1,949 feet deep)
  • Lake Tahoe, California/Nevada (1,645 feet deep)
  • Lake Chelan, Washington (1,486 feet deep)
  • Lake Superior, Michigan/Wisconsin/Minnesota (1,332 feet deep)
  • Lake Pend Oreille, Idaho (1,158 feet deep)


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The maximum-recorded depth of Tahoe is 1,645 ft. or 501 meters. In North America, two other lakes are deeper than Tahoe; one is Crater Lake in Oregon at 1,945 feet or 593 meters in depth.

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Crater Lake's water comes only from rain and snowfall. It is actually one of the purest lakes in the world, so you can rest assured that it is very clean and safe to swim in!

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The deep sea rover in Crater Lake. Scientists and biologists spent 20 days at Crater Lake during the summer of 1987 studying the chemistry, biology, hydrology, and geology of the bottom of the lake. The research group used various instruments including the rover vehicle pictured to the left.

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In 1989, scientists completed 24 trips to the bottom of Crater Lake using a mini-submarine. They came across strange blue pools filled with dissolved mineral salt, 60-foot bacterial mats, and a temperature reading of 66° Fahrenheit at the very bottom of the lake.

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Lake Superior is the Cleanest and Clearest Great Lake Because of its somewhat isolated location and long cold winters, not much farming is done along Superior's shores. This means lower amounts of nutrients, sediments, and organic material are floating around the lake.

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Lake Erie. The fourth largest out of the five Great lakes, Erie is also the shallowest and the smallest in volume. In terms of surface area, Erie takes thirteenth place in the world. Niagara River is its biggest natural outflow, providing a huge amount of hydroelectric power to both the United States and Canada.

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Lake Baikal, Russia It is the deepest lake in the world and the largest freshwater lake by water volume. It even has its freshwater seal species that is endemic to the area. But apart from its incredible depth, Lake Baikal is also known to have one of the clearest and cleanest waters globally.

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Does the lake level change? Not much. The lake experiences twice as much precipitation as evaporation, but the caldera doesn't fill up because water seeps out through a porous rock layer along the north shore.

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Tribe members recognize Crater Lake as a site of power and danger and fear the dangerous beings that are believed to live inside the lake. According to legend, the lake was a sort of doorway or crossroads between the darkness of the Below-World, or Hell.

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