Mount Shasta or "White Mountain" is located at the southern end of the Cascade Range in Siskiyou County, California, and at 14,179 feet is the second-highest peak in the Cascades and the fifth-highest in California. Mount Shasta has an estimated volume of 85 cubic miles which makes it the most voluminous stratovolcano in the Cascade Volcanic Arc. Photo by Carol Highsmith.