  Fortress Island | |
| Geography | |
|---|---|
| Location | San Juan County, Washington |
| Coordinates | 48°27′55″N 122°50′19″W / 48.4653786°N 122.8385103°W |
| Archipelago | San Juan |
| Administration | |
Fortress Island is one of the San Juan Islands in San Juan County, Washington, USA. Located in Lopez Sound, the uninhabited, rocky island has a land area of 3.21 acres (1.30 hectares) and is almost completely devoid of vegetation.[1] It is part of the Turtleback complex, a series of intrusive rocks in Lopez Sound formed out of crystallized molten magma that also includes Bird Rock, Low Island, and others.[2]
Fortress Island is part of the San Juan Islands National Wildlife Refuge and is managed by the U.S. Fish and Wildlife Service.[3] As with almost all of the islands in the refuge, human access is prohibited and boats may not approach to within 200 yards (180 m).[4]
- ^ "The Geology of the San Juan Islands". cr.nps.gov. National Park Service. Archived from the original on 27 December 2014. Retrieved 16 January 2015.
- ^ Protection Island and San Juan Islands National Wildlife Refuges (PDF). U.S. Fish and Wildlife Service. pp. 3–12.
- ^ "San Juan Wilderness". wilderness.net. Wilderness.
- ^ "Plan Your Visit". fws.gov. U.S. Fish and Wildlife Service. Retrieved 16 January 2015.