Kobeytuz — salty closed lake in Kazakhstan. Located at an altitude of 253 m above sea level, on the territory of Ereimentau district to the North-East of the city of Sochi, just North of the station Korzhinkol, East of the bitter-salty lake Tengiz lake Corbell to the North-East of the salt lake Kyixor and West of salt lake Oinaxor. The lake has a rounded shape.

Every few years, the lake turns pink. It is believed that the pink hue of the water is given by the presence of the seawood d-salina.