Mount St. Helens Louwala - Clough 3,000 ft (1 km) high steam plume on May 19, 1982, two years after its major eruption Highest point Elevation 8,363 ft (2,549 m) Prominence 4,605 ft (1,404 m) Listing Washington most prominent peaks 11th Washington isolated peaks 11th Washington highest peaks 52nd Coordinates 46 ° 11 ′ 28 '' N 122 ° 11 ′ 40 '' W ﻿ / ﻿ 46.1912000 ° N 122.1944000 ° W ﻿ / 46.1912000; - 122.1944000 Coordinates: 46 ° 11 ′ 28 '' N 122 ° 11 ′ 40 '' W ﻿ / ﻿ 46.1912000 ° N 122.1944000 ° W ﻿ / 46.1912000; - 122.1944000 Naming Native name Lawetlat'la Loowit Geography Mount St. Helens Skamania County, Washington, United States Parent range Cascade Range Topo map USGS Mount St. Helens Geology Age of rock < 40,000 yrs Mountain type Active stratovolcano (Subduction zone) Volcanic arc Cascade Volcanic Arc Last eruption 2004 -- 2008 Climbing First ascent 1853 by Thomas J. Dryer Easiest route Hike via south slope of volcano (closest area near eruption site)
what is the height of mount st helens
8,363 ft (2,549 m)