Shishaldin Volcano

Shishaldin Volcano, or Mount Shishaldin (), is a moderately active volcano on Unimak Island in the Aleutian Islands chain of Alaska in the United States. It is the highest mountain peak of the Aleutian Islands and rises about 10,000m from the bottom of the Aleutian Trench 140 miles south of the volcano. The volcano's topographic contour lines are nearly perfect circles above 6,500 feet. The lower north and south slopes are somewhat steeper than the lower eastern and western slopes. Only on the volcano's west flank between about 3500 to 6500 ft are small areas of rough topography which are remnants of an older collapsed volcano upon which Shishaldin is built. The volcano is the westernmost of three large stratovolcanoes along an east–west line in the eastern half of Unimak Island.

The upper 6,600 ft is almost entirely covered by glacial snow and ice. In all, Shishaldin's glacial shield covers about 35 square miles.