National park, northwestern Washington, U.S. Established in 1938 to preserve the Olympic Mountains and their forests and wildlife, it covers 1,442 sq mi (3,735 sq km); it includes a strip of Pacific Northwest shoreline geographically separated from the rest of the park.
There are more than 60 glaciers in the park. The western part includes rainforests; the eastern slopes feature lakes; and the ocean shore section contains scenic beaches and three Indian reservations.