Mount Rainier National Park is a United States National Park located in southeast Pierce County and northeast Lewis County in Washington state. It was one of the US's earliest National Parks, having been established on March 2, 1899 as the fifth national park in the United States. The park contains 368 square miles (950 km2) including all of Mount Rainier, a 14,411-foot (4,392 m) stratovolcano. The mountain rises abruptly from the surrounding land with elevations in the park ranging from 1,600 feet (490 m) to over 14,000 feet (4,300 m). Ninety-seven percent of the park is preserved as wilderness under the National Wilderness Preservation System, including Clearwater Wilderness and Mount Rainier Wilderness. It is abutted by the Tatoosh Wilderness.
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