Mystery Bay State Park is an Washington marine state park on Mystery Bay, a small inlet off Scow Bay/Kilisut Harbor on the western side of Marrowstone Island. The park is located approximately one-half mile north of the Nordland General Store (which also faces Mystery Bay) on Flagler Road (SR 116). Many older wooden sailboats can be swinging at permanent moorage at the park. Park activities include picnicking, shellfish harvesting, fishing, boating, beachcombing, and scuba diving. References External links Mystery Bay Marine State Park Washington State Parks and Recreation Commission Mystery Bay Marine State Park Map Washington State Parks and Recreation Commission Parks in Jefferson County, Washington State parks of Washington (state) Protected areas established in 1972