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Range DescriptionSylvilagus robustus has historically been known to occur in the Guadalupe Mountains (Texas and New Mexico), the Chisos Mountains (Texas), the Davis Mountains (Texas), and the Sierra de la Madera (Coahuila, Mexico). Currently, it is suspected that the Guadalupe and Chisos Mountains populations have been extirpated (Ruedas 1998). An unconfirmed Sylvilagus population may exist in the Sierra del Carmen, but it is unknown if it is S. robustus (Ruedas 1998).
S. robustus is not known to occur below 1,500 m in elevation, and becomes more common above 1,800 m (Ruedas 1998). The contiguous area in the Davis Mountains that contains suitable vegetation preferred by S. robustus is 1,815 km, but when considering the areas above 1,675 m only, potential habitat within the range is reduced to approximately 730 km (Ruedas 1998).