Jarrell Cove State Park is a 43-acre marine camping park with 3,500 feet of saltwater shoreline on the northwest end of Harstine Island in south Puget Sound. The forested island park is accessible by road and bridge and is off the beaten path. Most visitors arrive by boat. The park has campsites near the docks, as well as on rolling, grassy areas. Jarrell Cove State Park administers five other satellite parks including Harstine Island, McMicken Island, Stretch Point, Eagle Island and Hope Island State Parks. Harstine Island State Park is a day use park with beach access via a half-mile trail. It is a two mile drive from Jarrell Cove. The other satellite parks are all accessible by boat only and offer buoys for moorage. This forested island park is reached most easily by boat. Beach exploration is popular.

The park is named after Mrs. Philura Jarrel, the first pioneer woman to settle on the island. Jarrell Cove was acquired in four parcels between 1953 and 1969.

A Discover Pass is required for vehicle access to Washington state parks for day use. For more information about the Discover Pass and exemptions, please visit the Discover Pass web page.

Jarrell Cove State Park has standard campsites, partial-hookup sites, one restroom, and one shower.