Colorado records
North American Racer in Colorado
HarmlessColuber constrictor

Yes. The North American Racer has been recorded in 37 Colorado counties. It is non-venomous (harmless). Slender, smooth-scaled, usually solid black, blue, or tan with large eyes.
Colorado counties with North American Racer records
37 listedSee the full North American Racer profile or all snakes in Colorado.