Crater Lake is the remnant of Mount Mazama, which erupted catastrop...
By Volcano Hazards Program
2005 (approx.)

Detailed Description
Crater Lake is the remnant of Mount Mazama, which erupted catastrophically 7,700 years ago to form the caldera.Wizard Island in lake and Mount Scott is peak on right shore. View from south. Oregon
Sources/Usage
Public Domain.