Saltwater State Park is a 137-acre Washington state park on Puget Sound in Des Moines, known for its 1,445-foot shoreline, sandy swimming beach, rocky tideflats, and a submerged artificial reef that attracts scuba divers. Inland, second-growth timber and the steep McSorley Creek ravine shape a network of trails, tributary streams, cliffs, ridges, and wooded plateaus, with about 30 campsites along the creek road. The park also supports salmon spawning and diverse fish habitat. Designated a Marine Protected Area in 2009, it is one of the most heavily used parks in the Puget Sound region, drawing about 350,000 visitors each year despite nearby bridge traffic and aircraft noise.