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Mailing Address:
Crater Lake National Park
P.O. Box 7
Crater Lake, Oregon 97604
Phone: (541)594-3000
Fax: (541)594-3010
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Did You Know? Crater Lake was formed when a massive eruption of Mount Mazama 7700 years ago caused the mountain to collapse, leaving a steaming caldera. Centuries of rain and snow filled the caldera creating Crater Lake.
Last Updated: July 30, 2006 at 20:01 EST