Mount Churchill, Stratovolcano in Wrangell-St. Elias National Park, Alaska, US

Mount Churchill is a stratovolcano in Wrangell-St. Elias National Park in Alaska that rises to approximately 4,766 meters (15,620 feet) in elevation. The volcano features a broad caldera on its eastern side and is heavily covered by glaciers and snow-covered slopes that dominate its appearance.

Mount Churchill is the source of the White River Ash, deposited in two of North America's largest eruptions of the past two millennia. The northern lobe fell about 1,890 years ago; the larger eastern lobe erupted in winter 852/853. The ash reached as far as Europe, and evidence suggests the Athabaskan people left the region for the present-day United States because of the eruption.

The mountain's name comes from the Klutlan Glacier, which runs along its eastern and southern side; the glacier's meltwater feeds the White River. The volcano is also called White River volcano, after the ash it spread. The Athabaskan people left the region for the present-day United States after the eruption, according to evidence cited in the sources.

The mountain is extremely remote and typically accessed only by airplane or after extended hikes through undeveloped backcountry terrain. Visitors should rely on air services with experience in arctic conditions and wait for stable weather, as the surroundings present harsh and changing conditions.

Scientists extracted one of the longest ice cores from non-polar regions beside this mountain, reaching a depth of about 461 meters. This ice archive holds detailed records of temperatures and precipitation spanning many centuries of the past.