Fire Island National Seashore (FINS) is a United States National Seashore that protects a 26-mile (42 km) section of Fire Island, an approximately 30-mile (48 km) long and 0.5-mile (0.80 km) wide barrier island separated from Long Island by the Great South Bay. The island is part of New York State's Suffolk County and the Outer Barrier. Fire Island National Seashore was established as a unit of the National Park Service on September 11, 1964.