It is in the Anza-Borrego desert in south central California and covers about 45 square miles (120 km2).
The majority of the range is in Anza-Borrego Desert State Park and about a third is owned by the United States Bureau of Land Management, including the Fish Creek Mountains Wilderness.
The range is closed to the public due to the hazard of unexploded ordnance.
An inspection in 1970 found only detonated or non-explosive ordnance, but it took place in only one day.
Clearing the area of bombs is made difficult by the large number of munitions and the fact that they burrowed up to 30 feet (9.1 m) into the ground after being dropped from aircraft, although some have worked their way up to the surface through natural processes.