Global Volcanism Program | Image GVP-03083
The close proximity of the Three Sisters volcanoes, in contrast to the other large Cascade volcanoes that are typically 60-100 km apart, can be seen in this view of South Sister volcano from the summit of North Sister with the glacier-covered slopes of Middle Sister to the lower right. Mount Bachelor is in the distance to the left.
Photo by Lee Siebert, 1984 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.