DIABLO RANGE

segment of the Pacific Coast Ranges extending southeastward for about 180 miles (290 km) from the solitary Mount Diablo (3,849 feet ) within Mount Diablo State Park, about 20 miles (32 km) east of Oakland, Calif., to northwest Kern county in west-central California, U.S. It parallels the Pacific Ocean and forms part of the western wall of the Central Valley. Averaging 3,000 to 4,000 feet (914 to 1,219 m), the range is highest at San Benito Mountain (5,239 feet ). The name Monte del Diablo (Devil's Woods) referred to an Indian ranchera near the ridge and was first recorded in 1824. Cattle grazing, petroleum, and agriculture are the region's main economic activities.