Mount Kaguyak is a stratovolcano located in the northeastern part of the Katmai National Park and Preserve in the U.S. state of Alaska. The wide caldera is filled by a more than 180 m deep crater lake. The surface of the crater lake lies about 550 m below the rim of the caldera. Postcaldera lava domes form a prominent peninsula in the center of the lake. The volcano is high and is topographically prominent because it rises from lowland areas near sea level in the south of the Big River. Based on radiocarbon dating the caldera-forming eruption occurred about 5800 years before present. During this eruption at least were covered in a dacitic ignimbrite. References Stratovolcanoes of the United States Volcanoes of Kodiak Island Borough, Alaska Mountains of Kodiak Island Borough, Alaska Mountains of Alaska Volcanoes of Alaska VEI-5 volcanoes Calderas of Alaska Volcanic crater lakes Aleutian Range Holocene calderas