The Three Sisters are closely spaced volcanic peaks in the U.S. state of Oregon. They are part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Washington and Oregon to Northern California. South Sister, also known as "Charity", is the tallest volcano of the trio, standing at 10,363 feet.
Mountains, Rock Formations
Links: en.wikipedia.org
By: jbottero
