Mount Kukak, Stratovolcano on the Alaska Peninsula, United States

Mount Kukak is a stratovolcano on Alaska Peninsula that rises to about 2,040 meters and maintains an ice-covered exterior year-round. Steam vents regularly release gas from beneath the surface, indicating geological activity continues inside the mountain.

Mount Kukak is the only volcano in the Denison-Steller-Kukak chain that shows geothermal activity, with a fumarole field at its base. Its summit reaches 2,043 metres at the end of a volcanic chain in a glacier-covered, very remote sector of Katmai National Park. The date of its last eruption is unknown.

The mountain sits at the end of the Denison-Steller-Kukak volcano chain, in a glacier-covered and very remote sector of Katmai National Park. It is the only volcano in that chain with geothermal activity, shown by a fumarole field at its base. The name Kukak is shared with the surrounding area of the Alaska Peninsula.

The site is best reached through Katmai National Park, with boat travel across local lakes as the primary way to get there. Visitors should prepare for harsh weather and bring warm, waterproof gear.

Despite the volcano showing no documented eruptions in recent history, its active steam vents reveal ongoing geological processes beneath the surface. This continuous inner activity makes it a living geological laboratory for scientists to study.