The snow-mantled peaks on the northern horizon are the remnants of Mount Mazama, seen here from the summit of Mt. McLoughlin. Mount Mazama was a complex of overlapping edifices that was once one of Oregon's largest volcanoes, until it collapsed about 7,700 years ago and formed the 8 x 10 km Crater Lake caldera. The highest peak to the right is Mount Scott, part of a pre-caldera edifice east of the caldera rim.

Photo by Lee Siebert, 1998 (Smithsonian Institution)

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Crater Lake