Fumaroles On Gareloi Island
Fumaroles on Gareloi Island vent from 3,276 feet elevation on this remote volcanic island in the Alaska Maritime National Wildlife Refuge, representing high-elevation geothermal features in some of the nation's most isolated terrain. The site sits 31 miles from the nearest road.
Located atop this volcanic island in the Aleutian chain, the fumaroles emerge from exposed volcanic rock at extreme altitude. The harsh maritime climate brings wind and precipitation year-round, with 69 inches of annual snow and 44 inches of rain. The barren, windswept peak contrasts starkly with surrounding open ocean.
Gareloi Island's fumaroles formed through active Aleutian volcanic processes, where magmatic heat drives thermal features at high elevation. The fumarole system reflects ongoing geothermal and volcanic activity characteristic of this subduction zone landscape, managed under the highest conservation protection status.
Access to Gareloi Island is severely restricted—the site lies 31 miles offshore in the Aleutian chain. Visit only by charter vessel or aircraft with special permits from the US Fish and Wildlife Service. The Alaska Maritime Wildlife Refuge maintains permanent protection with restricted public access. Summer visits (July through August) only are practical. This site is accessible only to serious expedition teams.
Is Fumaroles On Gareloi Island worth visiting?
Best for
- Backpacking adventures
Not ideal for
- Day trips with young children