Alamogordo is the seat of Otero County , New Mexico , United States . A city in the Tularosa Basin of the Chihuahuan Desert , it is bordered on the east by the Sacramento Mountains and to the west by Holloman Air Force Base . The population was 30,403 as of the 2010 census . Alamogordo is known for its connection with the Trinity test , the first explosion of an atomic bomb
Trinity
Trinity (nuclear test)
Alamogordo, New Mexico