View endemic snakes in other US states
Common snakes found in the state of Colorado
Western Rattlesnake
High Risk
Venomous
50–95 cm (20–37 in)
- Arizona
- Colorado
- Idaho
- Iowa
- Kansas
- Montana
- Nebraska
- New Mexico
- North Dakota
- Oklahoma
- South Dakota
- Texas
- Wyoming
Glossy Snake
Zero Risk
Nonvenomous
75–130 cm (30-50 in)
- Arizona
- California
- Colorado
- Kansas
- Nevada
- New Mexico
- Oklahoma
- Texas
- Utah
Racer
Low Risk
Nonvenomous
50 -152 cm (20 -60 in)
- All States except Alaska & Hawaii
Ringneck Snake
Zero Risk
Nonvenomous
25–38 cm (10–15 in)
- All States except Alaska & Hawaii
Emory’s Rat Snake
Low Risk
Nonvenomous
80 –150 cm (31–59 in)
- Colorado
- Missouri
- Nebraska
- Texas
Western Hognose Snake
Low Risk
Nonvenomous
40–50 cm (15–20 in)
- All States except Alaska & Hawaii
Night Snake
Low Risk
Venomous
30–66 cm (12–26 in)
- Arizona
- California
- Colorado
- Hawaii
- Idaho
- Montana
- Nevada
- New Mexico
- Oregon
- Utah
- Washington
- Wyoming
Gray-banded Kingsnake
Low Risk
Nonvenomous
91 – 120 cm (3-4 ft)
- Arkansas
- Colorado
- Louisiana
- Montana
- New Mexico
- North Dakota
- Oklahoma
- South Dakota
- Texas
- Utah
- Wyoming
Common Kingsnake
Low Risk
Nonvenomous
90– 122 cm (35–48 in)
- Alabama
- Arizona
- Arkansas
- California
- Colorado
- Delaware
- Florida
- Georgia
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maryland
- Mississippi
- Missouri
- Nebraska
- Nevada
- NewJersey
- NewMexico
- NewYork
- NorthCarolina
- Ohio
- Oklahoma
- Oregon
- SouthCarolina
- Tennessee
- Texas
- Utah
- Virginia
- WestVirginia
Striped Whipsnake
Low Risk
Nonvenomous
76–183 cm (30-72 in)
- Alaska
- Arizona
- California
- Colorado
- Hawaii
- Idaho
- Montana
- Nevada
- New Mexico
- Oregon
- Utah
- Washington
- Wyoming
Northwestern Garter Snake
Low Risk
Nonvenomous
33–97cm (13–38 in)
- California
- Oregon
Smooth Green Snake
Low Risk
Nonvenomous
36–51 cm (14–20 in)
- Colorado
- Illinois
- Illinois
- Indiana
- Iowa
- Kentucky
- Michigan
- Minnesota
- Missouri
- New Mexico
- Ohio
- Texas
- Virginia
- West Virginia
- Wisconsin
- Wyoming
Longnose Snake
Low Risk
Nonvenomous
56–81 cm (22–32 in)
- Arizona
- California
- Colorado
- Idaho
- Kansas
- Nevada
- New Mexico
- Oklahoma
- Texas
- Utah
Ground Snake
Low Risk
Nonvenomous
20–48 cm (8–19 in)
- Arizona
- Nevada
- California
- Colorado
- Kansas
- Missouri
- New Mexico
- Oklahoma
- Oregon
- Texas
- Utah
Redbelly Snake
Low Risk
Nonvenomous
4–10 cm (10–25 in)
- All States except Alaska & Hawaii
Southwestern Blackhead Snake
Low Risk
Nonvenomous
20–38 cm (8–15 in)
- Arizona
- California
- Colorado
- Nevada
- New Mexico
- Texas
- Utah
Plains Blackhead Snake
Low Risk
Nonvenomous
18–38 cm (7–15 in)
- Arizona
- Colorado
- Kansas
- Nebraska
- New Mexico
- Oklahoma
- Texas
Yaqui Blackhead Snake
Low Risk
Nonvenomous
18–38 cm (7–15 in)
- Arizona
- Colorado
- Kansas
- Nebraska
- New Mexico
- Oklahoma
- Texas
Western Terrestrial Garter Snake
Low Risk
Nonvenomous
46–104 cm (18–41 in)
- Arizona
- California
- Colorado
- Idaho
- Kansas
- Montana
- Nebraska
- Nevada
- New Mexico
- Oklahoma
- Oregon
- Utah
- Washington
- Wyoming
Checkered Garter Snake
Low Risk
Nonvenomous
46–61 cm (8–24 in)
- Arizona
- California
- Colorado
- Nevada
- New Mexico
- Oklahoma
- Texas
- Utah
Western Ribbon Snake
Low Risk
Nonvenomous
43–127 cm (17–50 in)
- Arizona
- California
- Colorado
- Idaho
- Montana
- Nevada
- New Mexico
- Oregon
- Utah
- Washington
- Wyoming
Common Garter Snake
Low Risk
Nonvenomous
55–137 cm (22–54 in)
- All States except Alaska & Hawaii
Western Blind Snake
Zero risk
nonvenomous
30 cm (12 in)
- Arizona
- California
- Colorado
- Nevada
- New Mexico
- Oklahoma
- Texas
- Utah
For a full list of every venomous and nonvenomous snake found in the USA, check out my full article: Identity 130+ Snake Species From The USA (With Images)
