Range Description

The species' range extends from Oregon and Idaho in the United States, to southern Baja California, Sinaloa, and southern Coahuila in Mexico; west to California, east to Colorado and Texas (Stebbins 2003). The subspecies marmoratus (which is regarded as a distinct species by some authorities) ranges from southern New Mexico and southern and western Texas south through eastern Chihuahua and southern Coahuila.