The Chocolate Mountain Aerial Gunnery Range (CMAGR), is a open-area, approximately 20 miles wide, east to west, and 50 miles long, northwest to southeast, with a special use airspace of which is used for aerial bombing and live fire aerial gunnery practice. It straddles the northern portion of the Chocolate Mountains to the east of the Salton Sea in Imperial and Riverside Counties, California, with restricted airspace in both California and Arizona. It is under the jurisdiction of the United States Navy and United States Marine Corps, and is closed to the public.