- The diversity, ruggedness, and size of the wilderness offer excellent opportunities for solitude and primitive recreation. Desert bighorn sheep, and mule deer, bobcats, cougars, hawks and owls and various raptors frequent the region. Backpacking trips, horseback riding, day hiking, wildlife observation, photography and sightseeing are common.. This 64,000-acre wilderness is in southwest Maricopa County, 11 miles northwest of Gila Bend and 32 miles southwest of Phoenix, Arizona. This wilderness is accessible via old U.S. Highway 80 and Enterprise Road south of Arlington, via various jeep trails extending south from the Aqua Caliente Road, and via Interstate 8 and the Painted Rocks Dam Road west of Gila Bend. High-clearance vehicles are needed and four-wheel-drive vehicles are recommended, except for portions of the Enterprise Road south of Gillespie Dam.