Tags: Mountain Range.
The Sierra San Antonio range is a 10?-8 mile long mountain range joining the Patagonia Mountains at the U.S.-Mexico border and descending into lower elevations due south; the Sierra Madre Occidental cordillera is the continuation of this mountainous region southward.The range is named after a ‘Saint Antonio’. The highest peak of the Patagonia range is Mount Washington two miles north of the border and the San Antonio range.