Bannoye Lake, Protected lake in Bashkortostan, Russia

Bannoye Lake is a protected body of water in Bashkortostan, Russia, covering roughly 7.7 square kilometers and reaching a depth of 28 meters at its deepest point. The Yangelka River flows out of the lake, forming its single natural outlet.

The lake has been a hydrological natural monument of regional significance since 1965. Its basin belongs to the Ural River system, and the Yangelka, a right tributary of the Ural, flows out of it. The protected status covers the lake itself and its immediate shores.

The name originates from the Russian tradition of bathing in these waters, while the Bashkir term Yaktykul refers to the clarity of the lake. Both names remain in everyday use among locals, reflecting the bilingual nature of the region.

Several lodgings and leisure facilities line the shore, offering access for visitors throughout the year. The nearby Mount Bashmak hosts a ski area for winter activities.

Bannoye is the deepest lake in Bashkortostan, with a maximum depth of 28 metres and an average of 10.6 metres. It lies at 438 metres above sea level between the peaks of Kutukai (664 m) and Karanyalyk (620 m). Its older Bashkir name Mauyzdy comes from Mauyz, a mythical insatiable creature, meaning "bottomless".