1280 Engle Road, Coupeville, WA 98239.
Fort Casey Historical State Park is a 998-acre marine camping park with 10,810 feet of saltwater shoreline on Puget Sound (Admiralty Inlet); it includes Keystone Spit, a 2-mile stretch of land separating Admiralty Inlet and Crocket Lake. Dogs on a leash no longer than 8 feet are allowed the park, but are not permitted on designated swimming beaches.
