Shaytan-Tau Nature Reserve (Russian: Шайтан-Тау заповедник) (from the Turkic "Devils Mountain") is a Russian 'zapovednik' (strict nature reserve) located along the Shaytantau ridge of the Southern Urals. The ridge contains limestone reefs which are of Cambrian age, almost 500 million years old. The main purpose of the reserve is to conserve representative Dubravnaya steppe and low-lying bog habitats of relict and endemic species of plants and animals. The area is the youngest (and smallest) federal reserve in the Urals, being set aside for protection on October 9, 2014. It is separated into four sectors, situated in both the Kuvandyksky District of Orenburg Oblast, and in Bashkortostan. It is about 220 km from the regional city of Orenburg.