<Table> <Tr> <Th_colspan="2"> Mount St. Helens </Th> </Tr> <Tr> <Td_colspan="2"> Louwala - Clough </Td> </Tr> <Tr> <Td_colspan="2"> 3,000 ft (1 km) high steam plume on May 19, 1982, two years after its major eruption </Td> </Tr> <Tr> <Th_colspan="2"> Highest point </Th> </Tr> <Tr> <Th> Elevation </Th> <Td> 8,363 ft (2,549 m) </Td> </Tr> <Tr> <Th> Prominence </Th> <Td> 4,605 ft (1,404 m) </Td> </Tr> <Tr> <Th> Listing </Th> <Td> <Ul> <Li> Washington most prominent peaks 11th </Li> <Li> Washington isolated peaks 11th </Li> <Li> Washington highest peaks 52nd </Li> </Ul> </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 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 </Td> </Tr> <Tr> <Th_colspan="2"> Naming </Th> </Tr> <Tr> <Th> Native name </Th> <Td> Lawetlat'la Loowit </Td> </Tr> <Tr> <Th_colspan="2"> Geography </Th> </Tr> <Tr> <Td_colspan="2"> Mount St. Helens Skamania County, Washington, United States </Td> </Tr> <Tr> <Th> Parent range </Th> <Td> Cascade Range </Td> </Tr> <Tr> <Th> Topo map </Th> <Td> USGS Mount St. Helens </Td> </Tr> <Tr> <Th_colspan="2"> Geology </Th> </Tr> <Tr> <Th> Age of rock </Th> <Td> <40,000 yrs </Td> </Tr> <Tr> <Th> Mountain type </Th> <Td> Active stratovolcano (Subduction zone) </Td> </Tr> <Tr> <Th> Volcanic arc </Th> <Td> Cascade Volcanic Arc </Td> </Tr> <Tr> <Th> Last eruption </Th> <Td> 2004--2008 </Td> </Tr> <Tr> <Th_colspan="2"> Climbing </Th> </Tr> <Tr> <Th> First ascent </Th> <Td> 1853 by Thomas J. Dryer </Td> </Tr> <Tr> <Th> Easiest route </Th> <Td> Hike via south slope of volcano (closest area near eruption site) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Mount St. Helens </Th> </Tr>

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