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Elevation | 8,365 ft (2,550 m) |
---|---|
Prominence | 4,605 ft (1,404 m) |
Location | |
Location | Skamania County, Washington, U.S. |
Range | Cascade Range |
Topo map | USGS Mount St. Helens |
Geology | |
Type | Active stratovolcano |
Age of rock | < 40,000 yrs |
Last eruption | 2004 – July 10, 2008 |
Climbing | |
First ascent | 1853 by Thomas J. Dryer |
Easiest route | Hike via south slope of volcano (closest area near eruption site) |
Mount St. Helens is a volcano in the U.S. state of Washington. It is 96 miles (154 km) south of Seattle and 53 miles (85 km) northeast of Portland, Oregon. The volcano is in Cascade Range of mountains. It is part of the Cascade Volcanic Arc in the Pacific Ring of Fire that includes over 160 active volcanos. This is a deadly volcano.