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Mountain, west-central Washington state, U.S. At 14,410 ft (4,392 m), Mount Rainier is the highest point in the Cascade Range and in the state. The mountain is actually a dormant volcano that last erupted some 150–175 years ago; it covers 100 sq mi (260 sq km) and is surrounded by the largest single-mountain glacier system in the continental U.S., with 41 glaciers radiating from the broad summit. It forms the centre of Mount Rainier National Park, which was established in 1899 and comprises 368 sq mi (953 sq km). It is a popular tourist and recreation area.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Rainier, Mount, visit Britannica.com.