Mount Thielsen (2,799 m or 9,182 ft) is an extinct volcano north of...

(Public domain.)

Detailed Description

Mount Thielsen (2,799 m or 9,182 ft) is an extinct volcano north of Crater Lake, Oregon that last erupted 250,000 years ago. Aerial view.

Image Dimensions: 3625 x 2411

Date Taken: Tuesday, September 15, 1987

Location Taken: US

Source:

USGS photographer unknown