Yuma Desert
The Copper Mountains lie east of Yuma, Arizona and east of the Yuma Desert; also east of the Gila and Tinajas Altas Mountains. It lies on an extensive north-sloping desert plain that drains into the Gila River floodplain close to its confluence and outlet into the southern Colorado River in the Lower Colorado River Valley. The Lechuguilla Desert and Coyote Wash lie west of the mountains; the Tule Desert lies east. The highest point is Coyote Peak at .