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Highest point; Elevation: 492 to 4,521 ft (150 to 1,378 m) [1] Coordinates: 1]: Geography; Location: Skamania County, Washington, United States: Parent range: Cascade Range [2]: Topo map: USGS Bare Mountain: Geology; Rock age: less than 700,000 years [1]: Mountain type: Volcanic field [3]: Volcanic arc: Cascade Volcanic Arc [2]: Last eruption: ~7,700 years BP [1]: Marble Mountain-Trout Creek ...
Mount St. Helens National Volcanic Monument is a U.S. National Monument that includes the area around Mount St. Helens in Cowlitz and Skamania Counties, Washington.It was established on August 27, 1982, by U.S. President Ronald Reagan, following the 1980 eruption. [2]
The southern and eastern sides of the volcano drain into an upstream impoundment, the Swift Reservoir, which is directly south of the volcano's peak. Although Mount St. Helens is in Skamania County, Washington, access routes to the mountain run through Cowlitz County to the west, and Lewis County to the north.
The Juan de Fuca tectonic plate is being subducted under the North American Plate, leading to volcanic activity in the Cascades like at West Crater. In southern Washington state, the Cascade Range, which sits south of the dacitic Garibaldi Volcanic Belt, spans 600 miles (970 km) from British Columbia in Canada to Lassen Peak in northern California in the United States.
Sawtooth Mountain; Highest point; Elevation: 5,354 ft (1,632 m) [1] Coordinates: 2]: Geography; Location: Skamania County, Washington, U.S.: Parent range: Cascade Range: Topo map: Lone Butte O46121a7 1:24,000: Geology; Rock age: Pleistocene: Mountain type: shield volcano: Volcanic arc: Cascade Volcanic Arc: Climbing; Easiest route: Sawtooth Mountain Trail, Exposed Scramble, class 3: Sawtooth ...
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The Kulshan caldera is a Pleistocene volcano in the North Cascades of Washington and one of the few calderas identified in the entire Cascade Range. [ 1 ] [ 2 ] It is the product of the Mount Baker volcanic field , which has a history stretching back to possibly 3.722 million years ago.