Mount Douglas (Alaska)

Mount Douglas
Crater lake at the summit, June 1990
Highest point
Elevation	7,021 ft (2,140 m)
Prominence	6,300 ft (1,900 m)
Listing	US most prominent peaks 51st
Coordinates	58°51′36″N 153°31′59″W
Geography
Mount Douglas Location in Alaska
Location	Katmai National Park and Preserve, Alaska, U.S.
Parent range	Aleutian Range
Topo map	USGS Afognak D-5
Geology
Mountain type	Stratovolcano
Volcanic arc/belt	Aleutian Arc
Last eruption	Holocene

Mount Douglas is a stratovolcano located south of Kamishak Bay, near the northeasternmost part of the Alaska Peninsula. It lies in the Katmai National Park and Preserve in Kenai Peninsula Borough. The mountain was officially named in 1906 after nearby Cape Douglas based on a 1904 report by USGS geologist G. C. Martin. The Alaska Volcano Observatory currently rates Douglas as Level of Concern Color Code Not Assigned.

The volcano has a warm and highly acidic crater lake approximately 160 m (525 ft) wide. In 1982, the lake had a temperature of 21 °C and a pH of 1, and temperatures of 114-118°C were measured in 1991. At the north flank of the volcano unglaciated and relatively uneroded lava flows are found. The last eruption is not known, but probably occurred during the Holocene.

Map showing volcanoes of Alaska.

See also

• List of mountain peaks of North America
  • List of mountain peaks of the United States
    • List of mountain peaks of Alaska
• List of Ultras of the United States
• List of volcanoes in the United States

Other Sources

• Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
• Mt. Douglas - Alaska Volcano Observatory