S. No | Name | Area | Established | Location |
1 | San Juan Island National Historical Park | 2,072 acres (839 ha) | Sep 9, 1966 | San Juan County, Washington, USA |
2 | Olympic National Park | 922,650 acres (373,380 ha) | 29. Jun. 1938 | Jefferson, Clallam, Mason, and Grays Harbor counties, Washington, USA |
3 | Ebey's Landing National Historical Reserve | 19,333 acres (7,824 ha) | Nov 10, 1978 | Island County, Washington, USA |
4 | Mount Rainier National Park | 236,381 acres (369 sq mi; 95,660 ha; 957 km2) | 2. Mar. 1899 | Pierce County and Lewis County, Washington, USA |
5 | North Cascades National Park | 504,781 acres (204,278 ha) | 2. Oct. 1968 | Whatcom, Skagit, and Chelan counties, Washington, USA |
6 | Ross Lake National Recreation Area | 117,575 acres (47,581 ha) | Oct 2, 1968 | Whatcom County and Skagit County, Washington, USA |
7 | Lake Chelan National Recreation Area | 61,958 acres (25,074 ha) | Oct 2, 1968 | Chelan County, Washington, USA |
8 | Lake Roosevelt National Recreation Area | 100,390 acres (40,626 ha) | April, 1946 | Ferry, Stevens, Lincoln, and Grant counties, Washington, USA |
9 | Lewis and Clark National and State Historical Parks | 3,303 acres (1,337 ha) | May 29, 1958 | Clatsop County, Oregon and Pacific County, Washington, USA |