The Chocolate Mountain Aerial Gunnery Range (CMAGR), is a 456,000 acre (1850 km²) restricted area, approximately 20 miles wide, east to west, and 50 miles long, northwest to southeast, which is used by the Navy and Marines for aerial bomb

Bomb

A bomb is any of a range of explosive weapons that only rely on the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy...

ing and live fire aerial gun

Gun

A gun is a muzzle or breech-loaded projectile-firing weapon. There are various definitions depending on the nation and branch of service. A "gun" may be distinguished from other firearms in being a crew-served weapon such as a howitzer or mortar, as opposed to a small arm like a rifle or pistol,...

nery practice. It straddles the northern portion of the Chocolate Mountains

Chocolate Mountains

The Chocolate Mountains of California are located in Imperial County and Riverside County in the Colorado Desert in Southern California. The mountains stretch more than 60 miles in a northwest to southeast direction, and are located east of the Salton Sea and south and west of the Chuckwalla...

 to the east of the Salton Sea

Salton Sea

The Salton Sea is a shallow, saline, endorheic rift lake located directly on the San Andreas Fault, predominantly in California's Imperial Valley. The lake occupies the lowest elevations of the Salton Sink in the Colorado Desert of Imperial and Riverside counties in Southern California. Like Death...

 in Imperial

Imperial County, California

Imperial County is a county located in the Imperial Valley, in the far southeast of the U.S. state of California, bordering both Arizona and Mexico. It is part of the El Centro Metropolitan Area, which encompasses all of Imperial County. The population as of 2000 was 142,361. The county seat is the...

 and Riverside Counties

Riverside County, California

Riverside County is a county in the U.S. state of California. One of 58 California counties, it covers in the southern part of the state, and stretches from Orange County to the Colorado River, which forms the state border with Arizona. The county derives its name from the city of Riverside,...

, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, with restricted airspace in both California and Arizona

Arizona

Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

. It is under the jurisdiction of the U.S.

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 and Marines

United States Marine Corps

The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

, and is closed to the public.

The Bradshaw Trail

Bradshaw Trail

The Bradshaw Trail, nicknamed the Gold Road at one time, is an historic overland stage route in Southern California which originally connected San Bernardino, California to gold fields in La Paz, Arizona, some miles north of Ehrenberg...

, an old stage road and now a four wheel drive

Four Wheel Drive

The Four Wheel Drive Auto Company, more often known as Four Wheel Drive or just FWD, was founded in 1909 in Clintonville, Wisconsin, as the Badger Four-Wheel Drive Auto Company by Otto Zachow and William Besserdich.-History:...

vehicle road, traverses the north boundary of the Gunnery Range.