Mount Washington, seen here from Black Butte to the SE, is an eroded Pleistocene shield volcano capped by a steep central lava plug. NE flank spatter cones were active about 1300 years ago. Fresh lava flows in the foreground of this photo originated from Belknap volcano and cinder cones near North Sister volcano.

Photo by Lee Siebert, 1995 (Smithsonian Institution).

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

Washington