San Nicolas Island
- A profile of the island owned and operated by the U.S. Navy, with no civilian access.
- http://www.globalsecurity.org/military/facility/san-nicolas-island.htm

San Clemente Island
- The southernmost island, owned by the U.S. Navy and used for training. Lists civilian groups with access, by arrangement. Provides area usage schedule, and photo gallery of geography and military facilities.
- http://www.scisland.org/