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SAN ANTONIO MOUNTAIN. San Antonio Mountain is on the Texas-New Mexico border twenty miles northwest of Dell City in north central Hudspeth County (at 32°00' N, 105°33' W). Its summit reaches 7,023 feet above sea level. It is the westernmost, largest, and highest of the Cornudas Mountains. San Antonio Mountain is a laccolith, or mushroom-shaped igneous intrusion, from the Cretaceous period, some 100 million years ago. On it, shallow, stony soils support scrub brush and grasses.

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Handbook of Texas Online, "San Antonio Mountain," accessed November 18, 2017,

Uploaded on June 15, 2010. Published by the Texas State Historical Association.