Mount Rainier

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This article is about the volcano in Washington state. For other uses, see Mount Rainier (disambiguation).

Mount Rainier
Mount Tacoma (Lushootseed) Mount Tahoma (Lushootseed)
Mount Rainier as viewed from the northeast.
Highest point
Elevation	14,411 ft (4,392 m) [1] NAVD88
Prominence	13,210 ft (4,026 m) [1]
Isolation	731 mi (1,176 km) [1]
Listing	World most prominent peaks 21st North America prominent peaks 4th North America isolated peaks 7th US highest major peaks 17th U.S. state high point 4th Decade Volcano
Coordinates	46°51′10″N 121°45′37″WCoordinates: 46°51′10″N 121°45′37″W [2]
Geography
Mount Rainier Mount Rainier National Park, Pierce County, Washington, U.S.
Parent range	Cascade Range
Topo map	USGS Mount Rainier West
Geology
Age of rock	500,000 years
Mountain type	Stratovolcano
Volcanic arc	Cascade Volcanic Arc
Last eruption	November to December 1894[3]
Climbing
First ascent	1870 by Hazard Stevens and P. B. Van Trump
Easiest route	rock/ice climb via Disappointment Cleaver

Mount Rainier (pronounced: /reɪˈnɪər/), Mount Tacoma, or Mount Tahoma is the highest mountain of the Cascade Range of the Pacific Northwest, and the highest mountain in the U.S. state of Washington. It is a large active stratovolcano located 54 miles (87 km) south-southeast of Seattle, in the Mount Rainier National Park. It is the most topographically prominent mountain in the contiguous United States and the Cascade Volcanic Arc, with a summit elevation of 14,411 ft (4,392 m).^[4][5]
Mt. Rainier is considered one of the most dangerous volcanoes in the world, and it is on the Decade Volcano list.^[6] Because of its large amount of glacial ice, Mt. Rainier could produce massive lahars that could threaten the entire Puyallup River valley, and poses a grave threat to the southern sections of the Seattle metropolitan area, a city of over 650,000 people with more than 3.7 million living in its metropolitan area.^[7]