Crotalus transversus, or the Cross-banded Mountain Rattlesnake, is a venomous pit viper species found in central Mexico, known from less than 20 specimens.

[4] Adult females grow to a maximum recorded length of 46.5 cm (18.3 in).

[3] It is found in central Mexico in the Sierra Ajusco and the Sierra de Monte Alto of the Transverse Volcanic Cordillera in the states of México and Morelos at elevations exceeding 2,900 m (9,500 ft) in temperate boreal forests.

SW México (city), near Tres Marías (Tres Cumbres), Morelos [Mexico], elevation about 10,000 ft." (3,000 m)[2] This species is classified as Least Concern on the IUCN Red List of Threatened Species.

[5] The population trend was stable when assessed in 2007.