The topography is moderate to locally rugged, with elevations ranging from 2600ft to 4100ft above sea level. The area is characterized by a series of rugged, rock ridges trending northwest, with intervening valleys of low relief. Gullies are numerous. Rock exposure is abundant along the ridges and prominent hills but is much less in the lower valleys which tend to be overlain by gravel, talus, and shallow soil.
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland