DEVIL RIDGE. Devil Ridge begins four miles south of the Sierra Blanca in south central Hudspeth County and runs ten miles southeast (its center is at 31°03' N, 105°16' W). Its highest elevation is 5,294 feet above sea level, on Yucca Mesa, the northwestern end of the ridge. The system parallels the Quitman Mountains to the southwest; together the two chains form Red Light Draw, which runs southeast to the Rio Grande. The surrounding rolling terrain with local escarpments is surfaced by deep, fine sandy loams that support hardwood forest, brush, and grasses.