Bureau of Land Management, Arizona.
This 14,400-acre wilderness, located just 15 miles southwest of Phoenix, contains one of the most rugged mountain ranges in Arizona. The knife-edged ridgelines, steep slopes and rough rocky canyons provide challenges for hikers, backpackers, climbers and hunters. Butterfly Mountain rises 2,600 feet above the desert plain to an elevation of 4,119 feet in only two miles. The Quartz Peak Trail takes you to the summit of the Sierra Estrella.
The extreme elevation differences have cause diverse plant and animal communities. Plants in lower areas include saguaro and cholla, ocotillo, palverde, and elephant bush. Small protected sites on top of the mountains have shrub-live oak and even juniper. A remnant herd of desert bighorn sheep roam the mountains and Gila monster, desert tortoise, mountain lion, mule deer, coyote, javelina, giant spotted whiptail lizard, golden eagle, prairie falcon and Cooper's hawk also inhabit the wilderness.
In wilderness, you can enjoy challenging recreational activities and extraordinary opportunities for solitude. Please follow the regulations in place for this area, and use Leave No Trace techniques when visiting to ensure protection of its unique natural and experiential qualities.
Take Interstate 10 to exit 121 and travel south to reach the Rainbow Valley Road and Riggs Road. Unmaintained dirt roads extend eastward to the wilderness boundary from here.