Snakes in Colorado

Colorado is geographically diverse, with grasslands or prairies in the eastern part, deserts and shrub lands in the western region, and mountainous terrain from north to south and the center.

Hence, it is evident that the state has a fair number of snake populations, around 40, with just three venomous species. The venomous species mainly inhabit the prairies, shrublands, grasslands, and forest areas.

The snakes of Colorado mostly hibernate through the winter months. As per the Colorado Parks and Wildlife records, rattlesnakes hibernate between October 20 and March 20.

The Bullsnake, measuring 88 inches, is Colorado’s largest, while the blind snake is the state’s smallest.

Snakes in Colorado (CO)
RattlesnakesPrairie Rattlesnake
Midget Rattlesnake
Pit VipersWestern Massasauga
Garter SnakesPlains Garter Snake
Blackneck Garter Snake Common Garter Snake
Western Terrestrial Garter Snake Western Ribbon Snake
Whip SnakesStriped Whipsnake
Hognose SnakesWestern Hognose Snake
Water SnakesCommon Watersnake
KingsnakesCommon Kingsnake
Central Plains Milk Snake
Ground SnakesVariable Ground Snake
Rat SnakesGreat Plains Rat Snake
DiadophisRing-necked Snake
Prairie Ringneck Snake                
OpheodrysSmooth Green Snake
HypsiglenaNight Snake Desert Nightsnake Chihuahuan Nightsnake
RhinocheilusLong-nosed Snake
TantillaPlains Black-headed Snake Southwestern Black-headed Snake
Smith’s Black-headed Snake
ArizonaGlossy Snake
RenaTexas Blindsnake
Tropidoclonion Lined Snake
Pituophis Bull Snake
Great Basin Gophersnake
ColuberEastern-bellied Yellow Racer Western-bellied Yellow Racer
LeptotyphlopsNew Mexico Thread Snake

Snakes by Colors and Patterns

Black Snakes: Plains Black-headed Snake, Blackneck Garter Snake, Southwestern Black-headed Snake

Green Snakes: Smooth Green Snake

Quick Information

Biggest Snakes: Bullsnake

Smallest Snakes: Texas Blindsnake