Mount Griggs

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title: "Mount Griggs" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["volcanoes-of-lake-and-peninsula-borough,-alaska", "stratovolcanoes-of-alaska", "two-thousanders-of-the-united-states", "katmai-national-park-and-preserve", "aleutian-range", "mountains-of-lake-and-peninsula-borough,-alaska", "highest-points-of-united-states-national-parks", "pleistocene-stratovolcanoes", "holocene-stratovolcanoes", "dormant-volcanoes", "quaternary-alaska"] description: "Stratovolcano in the state of Alaska" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Mount_Griggs" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Stratovolcano in the state of Alaska ::

::data[format=table title="Infobox mountain"]

Field	Value
name	Mount Griggs
photo	MountGriggs.jpg
photo_caption	NW view from west rim of Katmai caldera, July 1990
elevation_ft	7602
elevation_ref
prominence_ft	7300
range	Aleutian Range
listing	{{unbulleted list
location	Katmai National Park and Preserve, Lake and Peninsula Borough, Alaska, U.S.
map	USA Alaska
map_caption	Alaska
map_size	250
label_position	left
coordinates
coordinates_ref
topo	USGS Mount Katmai B-4
formed_by	Subduction zone volcanism
type	Stratovolcano
volcanic_arc	Aleutian Arc
last_eruption	1790 BCE ± 40 years
::

| name = Mount Griggs | photo = MountGriggs.jpg | photo_caption = NW view from west rim of Katmai caldera, July 1990 | elevation_ft = 7602 | elevation_ref = | prominence_ft = 7300 | prominence_ref = | range = Aleutian Range | listing = {{unbulleted list |North America prominent 60th |North America isolated 91st | location = Katmai National Park and Preserve, Lake and Peninsula Borough, Alaska, U.S. | map = USA Alaska | map_caption = Alaska | map_size = 250 | label_position = left | coordinates = | coordinates_ref = | topo = USGS Mount Katmai B-4 | formed_by = Subduction zone volcanism | age = | type = Stratovolcano | volcanic_arc = Aleutian Arc | last_eruption = 1790 BCE ± 40 years | first_ascent = | easiest_route =

Mount Griggs, formerly known as Knife Peak Volcano, is a stratovolcano, which lies 10 km behind the volcanic arc defined by other Katmai group volcanoes. Although no historic eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The fumaroles on the southwest flank are the hottest, and some of the flank fumaroles can roar so loudly that they can be heard from the valley floor. The summit consists of three concentric craters, the lowest and largest of which contains a recent summit cone topped by two craters. The volume of the volcanic edifice is estimated at 25 km3. Isotopic analysis indicates that the source of Griggs' magma is distinct from the other Katmai volcanoes.

The mountain was named for Dr. Robert Fiske Griggs (1881–1962), botanist, whose explorations of the area, after the eruption of Mount Katmai in 1912, led to the creation of Katmai National Monument by President Woodrow Wilson in 1918. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/62/map_of_alaska_volcanoes_mount_griggs.jpg" caption="Map showing volcanoes of Alaska with the mark set at the location of Mount Griggs"] ::

NOTOC

References

References

1. {{cite gvp
2. "Griggs". [[Alaska Volcano Observatory]].
3. "Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs - Album". U.S. Geological Survey.
4. "Mount Griggs description and information". U.S. Geological Survey.
5. {{cite gnis

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::