Area 51

Geography

Map showing Area 51, NAFR, and the NTS

Area 51 shares a border with the Yucca Flat region of the Nevada Test Site (NTS), the location of 739 of the 928 nuclear tests conducted by the United States Department of Energy at NTS.^[13] The Yucca Mountain nuclear waste repository is 44 miles (71 km) southwest of Groom Lake.

The same "Area xx" naming scheme is used for other parts of the Nevada Test Site.^[14][15]

The original 6-by-10 mile (10 by 16 km) rectangular base is now part of the so-called "Groom box", a 23-by-25.3 mile (37 by 40.7 km) rectangular area of restricted airspace. The area is connected to the internal NTS road network, with paved roads leading south to Mercury and west to Yucca Flat. Leading northeast from the lake, the wide and well-maintained Groom Lake Road runs through a pass in the Jumbled Hills. The road formerly led to mines in the Groom basin, but has been improved since their closure. Its winding course runs past a security checkpoint, but the restricted area around the base extends further east. After leaving the restricted area, Groom Lake Road descends eastward to the floor of the Tikaboo Valley, passing the dirt-road entrances to several small ranches, before converging with State Route 375, the "Extraterrestrial Highway",^[16] south of Rachel.

Operations at Groom Lake

Groom Lake is not a conventional airbase, as frontline units are not normally deployed there. It instead appears to be used during the development, testing, and training phases for new aircraft. Once these aircraft have been approved by the United States Air Force or other agencies such as the CIA, operation of that aircraft is generally conducted from a normal air force base.

Soviet spy satellites obtained photographs of the Groom Lake area during the height of the Cold War, and later civilian satellites produced detailed images of the base and its surroundings. These images support only modest conclusions about the base, depicting a nondescript base, long airstrip, hangars and the lake.