King Khalid Air Base — Khamis Mushait, Saudi Arabia

King Khalid Air Base is a military airfield near Khamis Mushait in Saudi Arabia's Asir Region, set high in the country's southwestern highlands at an elevation of about 6,778 feet. It operates two asphalt runways, the longer around 12,467 feet, sized for the demands of a major air base rather than commercial passenger service. The Asir region's mountainous terrain and cooler climate set it apart from much of Saudi Arabia, and the base occupies elevated ground near one of the region's principal cities. As a defense facility, KMX is not a civilian gateway, but the code still identifies the airfield across aviation databases and among those following movements in the kingdom's south.