Lake Kezenoy-am (Lake Goluboye, Russian: Кезенойам, Голубое; Chechen: Къоьзаной-Iaм) is a lake in Chechnya near the border with Dagestan, Russia that goes through Andiyskiy Khrebet (Andian Ridge); later the border of Dagestan went into Chechnya taking half of the lake in to Dagestan. It is situated at an altitude of 1870 m above sea level and fills an area of 2.4 km². The maximum depth of the lake is 74 m. In winter the surface of the lake freezes and in summer the water temperature is around 5 °C. The lake water has a year-round supply of oxygen in which plankton survive.