Rosy boas occur in the southwestern United States and in adjacent areas of Mexico, specifically from Hanaupah Canyon (Death Valley area) in California south through Baja California, southwestern Arizona, and western Sonora, Mexico.
The Rosy Boa(Lichanura trivirgata) is a snake of the Boidae family, one of only two members of that family native to the United States. The other is the Rubber Boa(Charina bottae). The Rosy Boa is native to the American Southwest, and Baja California and Sonora, Mexico.
Rosy Boas spend most of their lives concealed beneath rocks and in crevices to escape the elements and natural predators. Granite outcroppings are the most common geologic association inhabited by the Rosy Boa. Less often they are found in association with volcanic or other rock types. Only in rare places do Rosy Boas inhabit rockless environments. In areas with few rocks Rosy Boas will use rodent burrows for concealment.