Crater Lake National Park

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Crater Lake is world known for its deep blue color. It lies within the caldera of Mt. Mazama, a volcano of the Cascade Range that erupted about 7,700 years ago. The mountain collapsed, forming a caldera. Annual rain and melting snow gradually filled it. Currently, evaporation and seepage balance annual precipitation and the present level is relatively constant. Its greatest depth of 1,932 feet makes it the deepest lake in the United States.

Established May 22, 1902.

Acreage: 183.224.05
Federal: 183,223.77
Non-Federal: 0.28.

For more information:

P.O.Box 7
Crater Lake, OR 97604
504-594-2211

Source: Crater Lake National Park pamphlet U.S. National Park Service/ U.S. Dept. of Interior


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