View endemic snakes in other US states
Common snakes found in the state of Idaho
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
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
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
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
Gopher Snake
Low Risk
Nonvenomous
91–213 cm (36-84 in)
- Arizona
- California
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Missouri
- Montana
- Nebraska
- Nevada
- New Mexico
- North Dakota
- Ohio
- Oklahoma
- Oregon
- South Dakota
- Texas
- Utah
- Washington
- Wisconsin
- Wyoming
Longnose Snake
Low Risk
Nonvenomous
56–81 cm (22–32 in)
- Arizona
- California
- Colorado
- Idaho
- Kansas
- Nevada
- New Mexico
- Oklahoma
- Texas
- Utah
Redbelly Snake
Low Risk
Nonvenomous
4–10 cm (10–25 in)
- All States except Alaska & Hawaii
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
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
Rubber Boa
Low Risk
Nonvenomous
38 -84 cm (1.25 – 2.76 ft)
- California
- Idaho
- Montana
- Nevada
- Oregon
- Utah
- Washington
- Wyoming
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)
