Washington
Harstine Island State Park
Verified by America’s State Parks Editorial Team – Updated March 2026
Harstine Island State Park is a public state park in Washington in Mason County. Spanning 471 acres and established in 1953, this park offers a peaceful retreat into nature for visitors of all ages.
Quick Facts
| State | Washington |
| County | Mason |
| Park Size | 471 acres |
| Established | 1953 |
Explore More Washington State Parks
Harstine Island State Park is one of many outstanding state parks in Washington. Discover more parks in our Best State Parks in Washington guide, or use our Park Finder to search by activity, location, or features.
Last updated: March 6, 2026
