Castle Air Force Base (Castle AFB, 1941–1995) is a former United States Air Force Strategic Air Command base in California, located northeast of Atwater, northwest of Merced, and about 115 miles (185 km) south of Sacramento. The Central Valley base in unincorporated Merced County was closed in 1995, pursuant to a Base Realignment and Closure Commission decision following the end of the Cold War and the disestablishment of Strategic Air Command (SAC). It is now known as the Castle Airport Aviation and Development Center.