Aushkul Lake, Protected lake in Uchalinsky District, Russia

Aushkul Lake lies by Starobayramgulovo in the Uchalinsky District, a drainless body in the Uy basin with a surface of 2.24 km², 2.05 km long and 1.4 km wide, averaging 1.85 m deep. Its bowl-shaped basin in Silurian and Devonian serpentinites, sandstones and clays has a flat muddy bottom. The west shore is dominated by Mount Aushtau, 645 m above sea level and 230 m above the lake.

The lake gained protection as a natural monument of Russia and has kept this status across different periods of Russian rule. This designation ensures the site and its surroundings remain protected from major development.

The Aushtau Mountain on the western shore holds a sacred water source called Aulia that matters deeply to Bashkir Muslims. People visit to collect water from this spring, and the site remains an active place of spiritual practice today.

The lake lies by Starobayramgulovo in Uchalinsky District, in the Uy River basin; the Shartadma flows in near the southwestern shore. Aushtau rises 230 m above the western bank, so the shore is reached on foot from the village. The water is shallow, averaging 1.85 m, and fed only by precipitation.

Jasper from the lake shores was used far beyond the Urals: four vases carved from Aushkul jasper by master Kokovin in Yekaterinburg, two dated 1824 and two 1833, stand in Hall 249 of the Hermitage's 17th-century Dutch art section.