Tags: Mountain Range.
The Copper Mountains is a minor north-south trending mountain range only 8 miles long in southwestern Arizona in the southwestern Sonoran 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.