Mount Rainier (/reɪˈnɪər/), also known as Tahoma or Tacoma, is a large
active stratovolcano in the Cascade mountain range located 59 miles (95
km) south-southeast of Seattle, in Mount Rainier National Park. With a
summit elevation of 14,411 ft (4,392 m), it is the highest mountain in the
U.S. state of Washington, and of the Cascade Range of the Pacific
Northwest, the most topographically prominent mountain in the contiguous
United States, and the tallest in the Cascade Volcanic Arc. Mt. Rainier is
considered one of the most dangerous volcanoes in the world, and it is on
the Decade Volcano list. Because of its large amount of glacial ice, Mt.
Rainier could produce massive lahars that could threaten the entire
Puyallup River valley. "About 80,000 people and their homes are at risk in
Mount Rainier’s lahar-hazard zones.