Colorado
Snakes in Washington County
7 species have been documented here, 2 of them venomous.
Venomous snakes in Washington 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.
Western RattlesnakeCrotalus oreganusVenomousHeavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Every snake recorded in Washington County
Plains Garter Snake
Thamnophis radix
Harmless
Prairie Rattlesnake
Crotalus viridis
Venomous
Gopher Snake
Pituophis catenifer
Harmless
Plains Hognose Snake
Heterodon nasicus
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
North American Racer
Coluber constrictor
Harmless
Western Rattlesnake
Crotalus oreganus
Venomous
Compiled from verified GBIF & iNaturalist observations. Informational only.
Snakes in Washington County: FAQ
- Are there venomous snakes in Washington County, Colorado?
- Yes. 2 venomous snake species have verified records in Washington County, Colorado, including Prairie Rattlesnake, Western Rattlesnake. Most snakes in Washington County, Colorado, however, are harmless.
- How many snake species live in Washington County, Colorado?
- 7 snake species have verified records in Washington County, Colorado, of which 2 are venomous.
- What is the most commonly seen snake in Washington County, Colorado?
- The Plains Garter Snake is the most frequently reported snake in Washington County, Colorado, based on verified wildlife observations.
- What should I do if I see a venomous snake in Washington County, Colorado?
- Keep your distance and do not try to catch or kill it. Most bites happen when people handle or corner a snake. If someone is bitten, contact local emergency services or poison control immediately.