Altai Nature Reserve (Russian: Алтайский заповедник, also called Altayskiy Zapovednik) is a Russianzapovednik (‘sanctuary, strict nature reserve’) in the Altai Mountains of south Siberia, Russia. It is part of the UNESCO World Heritage Site “Golden Mountains of Altai“, recognized as an area of high biodiversity and isolation from human intrusion. It is also included in the UNESCO World Network of Biosphere Reserves. The Altai Reserve includes the 30 km (19-mile) east bank of Lake Teletskoye and stretches 230 km (140 miles) into the high mountains to the southeast of the lake. It is situated in Ulagansky District and Turochaksky District in the north and east of the Altai Republic.
The reserve has an elongated shape running from the northeast to southwest along the Teletskoye basin and into the high interior. Elevations rise to 3,500 metres (11,500 ft). This territory averages 35 km (22 miles) wide through its 230 km (140-mile) length. Lake Teletskoye is in the upper northwest end. The Chulyshman River runs into the lake, with the Chulyshman valley forming part of the western border of the Altia Reserve. Most of the reserve is the plains and alpine ridges of the Chulyshman Highlands. Over 20% of the territory is rock, scree and gravel. On the high plateaus there are over 1,000 alpine lakes greater than 1 hectare (2.5 acres) in size.