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Yuma Desert is a lower-elevation section of the Sonoran Desert in the southwestern United States and the northwest of Mexico. It lies in the Salton Sink. The desert contains areas of sparse vegetation and has notable areas of Dune. With an average annual rainfall of less than , it is among the harshest deserts in North America. Human presence is sparse throughout; the largest city is Yuma, Arizona, on the Colorado River and the border of California.
The Yuma Desert also includes the sandy plains of western Sonora, going all the way to the head of the Gulf of California, then an inland strip reaching into the central Sonoran interior. The most significant river in this desert is the Gila River of Arizona. Organ Pipe Cactus National Monument is located in this desert, as are the Kofa National Wildlife Refuge and Cabeza Prieta National Wildlife Refuge.
To the south of Arizona's Yuma Desert, in northern Mexico, is the Pinacate Peaks volcanic field and biosphere reserve, part of the Gran Desierto de Altar, which is the southern extension of the Yuma Desert. It is on the northwestern foothills of Mexico's Sierra Madre Occidental, the western mountain cordillera.
The Yuma desert is the northern edge of the distributions of the elephant tree ( Bursera microphylla) and the blue Baja lily ( Triteleiopsis palmeri).
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