The Tres Marias cottontail is restricted to the Tres Marias Islands off Mexico. It has a brown throat patch and is usually active on the ground at night.
Its fur includes gray, brown, and red tones, with a pale reddish-brown underside. A brown patch marks the throat, and the tail is brown above and white below.
It is generally nocturnal and almost entirely terrestrial, though it is also seen during the day. It remains active throughout the year.
An extinction-risk assessment has not been added yet.