The Atlas mountain viper (Vipera monticola) is a very small species with a maximum total length (body + tail) of less than 40 cm (16 in).

[3] Spawls and Branch (1995) describe it as the smallest member of the genus Vipera, reaching a total length of only 345 mm (13.6 in).

[2] It is found in the High Atlas Mountains, Morocco.

The type locality given is "Haut-Atlas, Massif du Toubkal, Maroc...qu'entre 2.500 et 3.900 m " [Toubkal Massif, High Atlas Mountains, southwestern Morocco, between 8,200 and 12,800 ft].

[4] Listed as such because its extent of occurrence is likely not much more than 20,000 km2, and the extent and quality of its habitat are probably declining, therefore making the species close to qualifying for Vulnerable.