Colorado
Snakes in Denver County
11 species have been documented here, 1 of them venomous.
Venomous snakes in Denver County
Full guide & what to do if bitten →
Prairie RattlesnakeCrotalus viridisVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Denver County
Western Terrestrial Garter Snake
Thamnophis elegans
Harmless
Gopher Snake
Pituophis catenifer
Harmless
Plains Garter Snake
Thamnophis radix
Harmless
Lined Snake
Tropidoclonion lineatum
Harmless
North American Racer
Coluber constrictor
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Common Garter Snake
Thamnophis sirtalis
Harmless
Western Milksnake
Lampropeltis gentilis
Harmless
Boa Constrictor
Boa constrictor
Harmless
Mexican West Coast Boa Constrictor
Boa sigma
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.