Plains Garter Snake
- kingdom: Animalia
- phylum: Chordata
- class: Reptilia
- order: Squamata
- family: Natricidae
- genus: Thamnophis
- species: Thamnophis radix
Bloomington
IndianaBreckenridge
Lino Lakes
Redwood Falls
MinnesotaForsyth
Fort Benton
Glasgow
Glendive
Great Falls
Terry
MontanaCentral City
Chadron
McCook
North Platte
Oshkosh
Sutherland
NebraskaFort Totten
Kenmare
Larimore
Wahpeton
North DakotaBoise City
OklahomaBlackhawk
Fort Pierre
Pierre
South Dakota
United States