Saltwater State Park is a 137 acres plot of second-growth timber on Puget Sound in the city of Des Moines, Washington, United States. The main attraction is 1,445 feet of saltwater beachfront, including a sandy swimming beach in the southwest corner, and rocky tideflats along the west with a submerged artificial reef that is popular with scuba divers. Overlooked by most visitors is the steep ravine of McSorley Creek which winds inland in a gentle "S" curve joined by three tributary streams.