Matia Island State Park is a 145-acre marine park with 20,676 feet of saltwater shoreline on the Strait of Georgia. The island is part of the San Juan National Wildlife Refuge. Under a mutual agreement between the U.S. Fish and Wildlife Service and the Washington State Parks and Recreation Commission, five acres at Rolfe Cove are available to boaters as a marine park. Matia Island is a federal wildlife refuge and has use restrictions different from most Washington state parks. With the exception of the campground area at Rolfe Cove and the loop trail and its beaches, the island is closed to public access and use to protect habitat and wildlife.

The park features good fishing and diving in waters around the island. There are interesting geological formations and an old-growth forest.

Captain Eliza of the 1792 Spanish Expedition named the island "Isle de Mata." Mata has many meanings in Spanish, most having to do with lush plant growth. Some believe Matia refers to a woman's name. The U.S. Coast Survey conffered the name Matia in 1954.

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.

Camping is available on a first come, first served basis. Rolfe Cove on Matia Island offers six campsites, a sandy beach, one picnic site, and a composting toilet. There is no drinking water available on the island. The nearest potable water is on Sucia Island and available from April - September. There is no garbage service to the island. Visitors must pack-out what they pack-in.

Pets are not permitted.

Open fires are not permitted on the island, even in the campground. Gas stoves may be used for cooking. Please consult the campground bulletin board for current information.