A List of mountain ranges of the Sonoran Desert. Many of the mountains of southern Arizona are included, excluding the Madrean Sky Island ranges of southeast Arizona, extreme southwest New Mexico, or northeast Sonora, Mexico.
The Mojave Desert lies to the northwest; also in the northwest and west are mountain ranges of the lower elevation Colorado Desert, (west of the north-south section of the Colorado River of the Lower Colorado River Valley, in the southeast California deserts.)
Mountain ranges on the Baja California Peninsula east of the cordillera spine mountains are included. The middle section of the peninsula is the Vizcaino Desert; a few ranges are from the very south in Baja California Sur.
The mostly east-west flowing Bill Williams River forms the northern border of La Paz County, Arizona with Mohave County to the north. This is an approximate delimiting line between the Mojave Desert north and northwest, and to the Sonoran Desert to the south, east, and southeast. The Colorado Desert-(subsection of the Sonoran) lies across the Colorado River to the west, but intergrades into the higher elevation Mojave Desert northwestwards.
On Eastern border of Sonoran Desert-(Madrean Sky Island)