Has the bottom of Crater Lake been explored?

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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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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Crater Lake partially fills the collapsed caldera of the ancient Mount Mazama Volcano. The caldera is a bowl-shape depression of about 1,219 m (4,000 ft) deep. The maximum depth of Crater Lake recorded at the time of the July 2000 multibeam survey was 594 m ( 1,949 ft).

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How cold is the water? The average temperature (below 300 feet deep) is 38°. In the summer, the surface can warm up to 55° or 60°. Review daily temps and other lake data at MESOWEST STATION INTERFACE (utah.edu) .

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Cleetwood Cove Trail is the only legal access to the shore of Crater Lake. Depending on snow conditions, the trail is usually open from mid-June to late October. Swimming, wading and fishing are permitted in the lake.

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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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Landslides or rock falls could be triggered within Crater Lake caldera by earthquakes or by renewed volcanic activity. Failure of part of the caldera wall could cause a rapidly moving material to enter the lake, which may produce one or more large waves that could travel rapidly across Crater Lake and impact its shore.

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