Watch Hill is a campground and marina located on Fire Island, a barrier island off the south shore of New York's Long Island. The park is located across the Great South Bay from Patchogue and is contained within the Fire Island National Seashore. Watch Hill is located on the western edge of the 1,363-acre (5.52 km2) Otis Pike Fire Island High Dune Wilderness, the only federally designated wilderness area in the State of New York, containing a variety of barrier island ecosystems in relatively undisturbed condition.