Welcome to Marine Corps Air Station Yuma. You will soon become an integral part of the Marine Corps' premier aviation training base, serving along with approximately 5,000 fellow active duty Marines and sailors. With access to 2.8 million acres of bombing and aviation training ranges and superb flying weather, MCAS Yuma supports 80 percent of the Corps' air-to-ground aviation training. The location along the Colorado River makes Yuma and the surrounding area an oasis in the southwestern Sonoran Desert. The area offers a variety of recreation and water sports as well as hunting and fishing.