Mount Shishaldin, Unimak Island

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Shishaldin Volcano rises over 9,000 ft (2800 m) directly from the Pacific Ocean and is the highest volcano on Unimak Island, Alaska. Unimak is the easternmost and largest of the Aleutians Islands, and part of the Alaska Maritime National Wildlife Refuge.

Shishaldin is the youngest of the eastern group of Unimak volcanoes which includes neighboring Isanotski and Roundtop volcanos. The Shishaldin cone is less than 10,000 years old and lies on a glacially eroded remnant of an ancient shield volcano. Shishaldin is an active and explosive stratovolcano and despite the many violent eruptions has maintained a remarkable shape. This is one of the most symmetrical cone-shaped mountains on earth, the volcano's topographic contour lines are nearly perfect circles above 6,500 feet (2,000 m).

The volcano has been used for centuries as a navigational landmark by mariners, although the weather in the Aleutians often obscures the cone. The Aleuts named the volcano Sisquk, meaning "mountain which points the way when I am lost". The entire cone above about 2500 ft (800 m) elevation is covered by snow and glacial ice. Shishaldin Volcano was designated as a National Natural Landmark in 1967. Read more here and here. Click here to download the CoastView app and explore the shoreline of Shishaldin Volcano and Unimak Island.

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