Colorado records
Great Plains Ratsnake in Colorado
HarmlessPantherophis emoryi

Yes. The Great Plains Ratsnake has been recorded in 12 Colorado counties. It is non-venomous (harmless). Long-bodied with weakly keeled scales; blotched, striped, or solid depending on species.
Colorado counties with Great Plains Ratsnake records
12 listedSee the full Great Plains Ratsnake profile or all snakes in Colorado.