Night Snake (Hypsiglena torquata ). Nocturnal; occurs in rocky foothills surrounding valley.
Common Kingsnake (Lampropeltis getula ). Nocturnal during summer, diurnal during spring and fall; occurs in all habitats.
Coachwhip (Masticophis flagellum ). Diurnal; most common on valley floor.
Striped Whipsnake (Masticophis taeniatus ). Diurnal; occurs from valley floor well into Pinyon-juniper Woodland.
Gopher Snake (Pituophis catenifer ). Both nocturnal and diurnal; occurs in all habitats.
Long-nosed Snake (Rhinocheilus lecontei ). Nocturnal; occurs on valley floor.
Western Patch-nosed Snake (Salvadora hexalepis ). Diurnal; most common in sandy areas on valley floor.
Ground Snake (Sonora semiannulata ). Nocturnal; active in the early evening; prefers rocky areas.
Speckled Rattlesnake (Crotalus mitchellii ). Both nocturnal and diurnal; most common in rocky areas but present on valley floor.