Hope Island State Park - Mason is a Washington state park in Mason County that is accessible only by boat. It is located due east of Steamboat Island near the Totten Inlet. The park consists of 106 acre of old-growth forest and salt marsh with a 1.5 mi beach on Puget Sound. Park activities include picnicking, camping, hiking, fishing, clamming, beachcombing, and birdwatching. The park has been administered as a satellite of Jarrell Cove State Park, since acquisition from private owners of the island in 1990. Water is not available on the island, and open fires and pets are not permitted.