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.
FortressIsland 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...
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