Azas Nature Reserve (Russian: Азас заповедник) is a Russian 'Zapovednik' (strict nature reserve), located in the central part of the Todzha basin (a large intermountain trough within the Altai-Sayan mountain region) of south-central Asia about 500 km west of Lake Baikal.

The reserve stretches along the Azas River, and is situated in the Todzhinsky District of Tuva.

The base rock is Proterozoic and Paleozoic (that is, older than 250 million years) sandstones, limestones and various intrusions.

[2] The animal life in the reserve has not yet been fully studied, but is typical of the Altai-Sayan mountain country and the base steppe sections.

[2] Azas is a protected nature reserve, but ecological tourism is permitted on marked educational routes.