Robust cottontail

S. h. hesperius: endemic to northwestern and central , from the Hualapai Mountains south to the Sierra Ancha.

S. h. holzneri: The most widespread subspecies, ranging throughout mountains from southeastern Arizona and south-central (aside from the Guadalupe Mountains) south through Mexico along the Sierra Madre Occidental to Sinaloa.

S. h. robustus or Davis Mountains cottontail: historically, this subspecies was known to be to four mountain ranges. In Texas, it was known in the Guadalupe Mountains, Davis Mountains and Chisos Mountains. In New Mexico it was also known from the Guadalupe Mountains. In Coahuila, Mexico, it is known from the Sierra Madre Oriental mountain range. The Chisos and Guadalupe Mountains populations are suspected to be extirpated.^[1] It is considered Vulnerable on the IUCN Red List.