Mount Rainier National Park is an American national park located in southeast Pierce County and northeast Lewis County in Washington state. Preserving 236,381 acres including all of Mount Rainier, a 14,410-foot stratovolcano. The mountain rises abruptly from the surrounding land with elevations in the park ranging from 1,600 feet to over 14,000 feet. The highest point in the Cascade Range, Mount Rainier is surrounded by valleys, waterfalls, subalpine meadows and 91,000 acres of old-growth forest.More than 25 glaciers descend the flanks of the volcano, which is often shrouded in clouds that dump enormous amounts of rain and snow. The area was established as a national park on March 2, 1899, as the fourth national park in the United States.