Azas Nature Reserve, Nature reserve in Tuva, Russia

Azas Nature Reserve spans 300,390 hectares in the Todzhinsky District, encompassing mountain ranges, rivers, lakes, and diverse ecological zones within the Todzha Basin. The area contains varied natural habitats that shift from taiga forests to alpine environments.

The reserve was established on January 11, 1985, evolving from a regional beaver sanctuary. This protection was created to safeguard native wildlife and plant species across southern Siberia.

The reserve holds 30 sites of religious pilgrimage, according to the reserve's own count, and the most visited destination is Lake Azas, also called Todzha Lake. The Azas River flows into this lake and leaves it again as the Toora-Khem River, so the water body carries two names in local use.

The region experiences extreme temperatures, dropping to minus 54 degrees in winter, with only 52 frost-free days annually. Visitors should prepare for harsh conditions and brief seasons if exploring the terrain.

In 2003–2004, 17 beavers were moved from the Azas River to the Belin River in Kaa-Khemsky District under permits from Russia's Ministry of Natural Resources. The Azas River population then numbered 45–46 beavers in 13 settlements, with the aim of restoring the earlier count.