The name “Fena” refers to the river valley, the man-made reservoir (sometimes called a lake), and the ancient village of Fena. The Fena Lake (Reservoir) is the largest lake in the United States territory of Guam and it is a man made reservoir. The Fena Valley Reservoir is critical in Guam's water management system. Located in the south-central part of the island, the reservoir is fed by three rivers, the Imong, Almagosa, and Maulap Rivers, which drain eastward into the Pacific Ocean. Also referred to as the Naval Magazine, the reservoir is currently off-limits to the public as it functions as an ammunition storage facility, operated and maintained by the U.S. Navy. The area is near Sånta Rita-Sumai and Hågat to the west and Talo’fo’fo to the east.