Crotalus lorenzoensis is a species of pit viper.

[4] These vipers are usually smaller than their counterparts on the mainland.

[5] C. lorenzoensis is only known from the type locality, which is San Lorenzo Island, thus making it an endemic species.

[2] The snakes live mainly in rocky areas and arroyo bottoms, sometimes in dunes near the coast and in cavities formed by adjacent boulders.

[1] This species is classified as "Least Concern" (LC) on the IUCN Red List of Threatened Species.