Mystery Bay State Park is an eighteen-acre (7.3 ha) marine state park on Mystery Bay, in Jefferson, Washington, United States that offers picnicking, shellfish harvesting, fishing, boating, beachcombing, and scuba diving..
Mystery Bay State Park is an eighteen-acre (7.3 ha) marine state park on Mystery Bay, in Jefferson, Washington, United States that offers picnicking, shellfish harvesting, fishing, boating, beachcombing, and scuba diving..