All but three of the islands are designated wilderness area in the San Juan Wilderness (353 acres (1.43 km2)), also established in 1976. Visitors are prohibited, and boaters must keep at least 200 yards from the shore to avoid disturbing the wildlife.[3] Excluded are two state parks managed jointly with the Washington State Park System, five acres of Matia Island and Turn Island; Smith Island; and Minor Island.[4]
The habitats of the various islands range from small rocks to larger grassy or forested islands, some with high cliffs that provide nesting sites for a large variety of marine birds.
An estimated 200 species of birds visit the islands each year. Harbor seals and whales are common in surrounding water and black brant have historically used the kelp beds for winter feeding.[6]
Recreation
Recreation in the refuge is limited to wildlife watching from afar. Boaters are requested to stay 200 yards from wilderness when observing wildlife. Public entry to the designated land is not permitted, with the exception of Matia Island, which is accessed by a cove with a dock. Matia Island has a 5 acres (0.020 km2) campground and a 1 mile (1.6 km) trail through the wilderness.[5]