Snakes in Colorado

On this page, you can find an overview of snakes in Colorado. The list is separated into non-venomous and venomous snakes in Colorado. This should give you a quick overview if you are dealing with a venomous snake or not. Just click on any of the images or links to learn more about the snake.

If you have encountered a snake in Colorado that is not yet on our list or that you cannot identify yourself, we’ll be happy to identify it for you. Simply take a picture of it and upload your picture, a quick description and the U.S. state where it was found here on our snake identification page. 

List of venomous snakes in Colorado

Sistrurus Catenatus – Massasauga Snake

The massasauga snake, Sistrurus catenatus, is a venomous snake that can be found in several U.S. states in a wide ...
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Crotalus Viridis – Western Rattlesnake

The western rattlesnake or prairie rattlensnake, is a venomous snake species that can be found in the Mid-West of the ...
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Crotalus Oreganus – Pacific Rattlesnake

Crotalus oreganus, commonly called the (Northern) Pacific rattlesnake is a venomous rattlesnake found in Western America from British Columbia in ...
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Crotalus Concolor – Midget Faded Rattlesnake

The midget faded rattlesnake is a small venomous snake found around the basins of the Colorado River and the Green ...
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List of non-venomous snakes in Colorado

Tropidoclonion Lineatum – Lined Snake

The lined snake is a small nonvenomous snake found in the Central United States. The mostly dark snake usually comes ...
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Rhinocheilus Lecontei – Long-Nosed Snake

The long-nosed snake is a nonvenomous snake found in arid habitats in the Western United States. It has alternating black ...
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Sonora Semiannulata – Western Ground Snake

Sonora semiannulata, the western ground snake is a small nonvenomous snake found in the Western United States and in Mexico ...
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Masticophis Taeniatus – Striped Whipsnake

The striped whipsnake is a nonvenomous snake found in the Western and Southern United States and in Northwestern Mexico. It ...
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Lampropeltis Splendida – Desert Kingsnake

The desert kingsnake is a large black snake with yellow crossbands or spreckles. It occurs in the Southern United States ...
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Lampropeltis Californiae – California Kingsnake

The California kingsnake is a nonvenomous snake found in the Western United States, in Northwestern Mexico and as an invasive ...
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Lampropeltis Holbrooki – Speckled Kingsnake

The speckled kingsnake is a nonvenomous snake found in the Southern and Central United States. This large snake is most ...
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Hypsiglena Torquata – Night Snake

The night snake is a small, mostly nocturnal snake found in the Western United States and in Mexico. Its body ...
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Thamnophis Radix – Plains Garter Snake

The plains garter snake is a harmless snake species that is found throughout the Central United States and Canada. The ...
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Opheodrys Vernalis – Smooth Green Snake

The smooth green snake is a relatively small nonvenomous snake found throughout the Northeastern and Central United States. Its body ...
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Heterodon Nasicus – Western Hognose Snake

The western hognose snake, Heterodon nascius, is a harmless snake that can be found throughout the Central United States as ...
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Pituophis Catenifer – Pacific Gopher Snake

The Pacific gopher snake, Pituophis catenifer, is a nonvenomous snake found in the Western United States, Canada and Mexico. It ...
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Thamnophis Elegans – Western Terrestrial Garter Snake

The western terrestrial garter snake is a harmless snake species that can be found throughout the Western United States. Its ...
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Nerodia Sipedon – Common Watersnake

The common watersnake is a nonvenomous snake that is often seen throughout the Eastern United States as well as Southeastern ...
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Diadophis Punctatus – Ring-Necked Snake

The ring-necked snake, Diadophis punctatus, is a harmless small snake that can be found throughout most of the United States ...
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Thamnophis Sirtalis – Common Garter Snake

The common garter snake is the best-known and most widespread species among the garter snakes. It can be found throughout ...
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Charina Bottae – Rubber Boa

Charina bottae, the rubber boa, is the smaller of the two species of boas native to the United States. It ...
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Coluber Constrictor – Racer

Coluber constrictor, commonly called the eastern racer is a nonvenomous snake species. The species contains eleven subspecies that can be ...
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