About the Refuge
Guam National Wildlife Refuge is located on the island of Guam, an unincorporated U.S. Territory. Guam is the largest and southernmost island in the Mariana Archipelago, situated in the western Pacific Ocean, approximately 3,700 miles west of Honolulu and 1,500 miles south of Tokyo.
The Guam NWR is comprised of three units: the Andersen Air Force Base Overlay Refuge Unit, the Navy Overlay Refuge Unit, and the Ritidian Unit. The Ritidian Unit is located on the northern tip of Guam and encompasses approximately 1,203 acres, including 400 terrestrial acres and 832 acres of submerged offshore area.
The Ritidian Unit is open to the public daily from 7:30 a.m. to 4:00 p.m., except most federal holidays and during times in which the National Weather Service (NWS) has issued an advisory. Please check the NWS website here, to determine if the refuge will be closed due to life-threatening rip currents, hazardous surf conditions, typhoons, etc. Once all advisories have been lifted, the Ritidian Unit will resume normal operations.