Arid region, western North America. Covering 120,000 sq mi (310,000 sq km), the Sonoran Desert is located in southwestern Arizona and southeastern California, U.S., and northern Baja California and western Sonora state, Mex. The desert's subdivisions include the Colorado and Yuma deserts. Irrigation has produced many fertile agricultural areas, notably the Coachella and Imperial valleys. Warm winters in the Sonoran Desert attract tourists to resorts such as Palm Springs, Tucson, and Phoenix. Indian reservations (see Papago; Pima) are located there.
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