Located in the Chigmit Mountain subrange in Lake Clark National Park and Preserve, the 10,016-foot (3,053 m) volcano lies approximately 134 miles (215 km) southwest of Anchorage on the west side of lower Cook Inlet.

[1][2][4] The volcano's glaciers have extensively altered its profile, cutting, deep and creating steep cliffs and cirques.

[7] Fumaroles located at about 8,990 feet (2,740 m) elevation on the eastern flank produce nearly constant plumes of steam and minor amounts of sulfurous gases.

These plumes are quite vigorous and have resulted in numerous pilot reports and early historical accounts of "eruptions" at Iliamna Volcano.

This article incorporates public domain material from the United States Geological Survey