Mule Mountains

The Mule Mountains are a north/south running mountain range located in the south-central area of Cochise County, Arizona. The highest peak, Mount Ballard, rises to 7,500 ft (2,300 m). Prior to mining operations commencing there, the mountains were heavily forested with large Rocky Mountain Douglas-fir (Pseudotsuga menziesii glauca) and other conifers, but these were all cut down for housing needs and to feed the ore smelting furnaces in Douglas, Arizona, approximately 20 miles due east. Now, the primary vegetation of the Mules consists of manzanita (Arctostaphylos spp.) brush, juniper, lowland oaks and pines, and various grasses. To the east of the mountain range lies Sulphur Springs Valley, and the San Pedro River and Valley to the west.

Mule Mountains
Mule Mountains, viewed from near Hereford, Arizona
Highest point
PeakMount Ballard
Elevation7,374 ft (2,248 m) NAVD 88[1]
Length21 mi (34 km) North to South
Width33 mi (53 km) East to West Extent includes low land hills and valleys[2]
Area500 sq mi (1,300 km2)
CountryUnited States
RegionMadrean Sky Islands
Range coordinates31°29′N 109°52′W

The terrain is very rough, with very steep slopes descending into deep canyons. Common wildlife species include Mule deer (Odocoileus hemionus), White-tailed deer (O. virginianus), Collared Peccary (Pecari tajacu) (locally known as javalinas), various types of rodents, lizards and a wide variety of birds. The upper ridges of the mountains consist primarily of a very hard brecciate limestone, and it is very common to find fossils of clams and snails imbedded in them.

Immediately to the east central area of the Mules lies the Lavender Pit, a large and very deep open pit copper mine dug and mined by the Phelps Dodge Corporation between 1951 through 1974. Over a billion tons of copper were extracted from the mine, along with significant quantities gold, silver and lead. Also, as a by-product of the mining operations, high quality turquoise (locally known as Bisbee Blue) was also discovered.

On the east central slope of the Mule Mountains can be found the Copper Queen Mine. In its days of production, (late 19th century – early 20th century) it was the richest copper deposit ever discovered, causing the accompanying town of Bisbee, Arizona to prosper. Under this part of the Mule Mountains are many mining tunnels dug in pursuit of the rich copper ore. Today, Bisbee (also known as the "mile-high city," at elevation 5,300 ft or 1,600 m) is largely a tourist town and retirement community along the slopes of Tombstone Canyon in the heart of the Mules. There are currently no organized mining operations in effect in the Mule Mountains. Much of the east/southeastern area of the range is private property, owned by Phelps Dodge Corporation.


  1. "Mule". NGS data sheet. U.S. National Geodetic Survey. Retrieved 2014-02-06.
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