 It is the largest lake in the East Kazakhstan Region.The lake lies at an altitude of 420 m, is 105 km long and 22–48 km wide, with a maximum depth of 15 m. Its major tributaries are the "Kara Irtysh" (Black Irtysh) and Kendyrlyk from the east; its only outlet is the Irtysh River (or White Irtysh).The lake is generally frozen from the beginning of November to the end of April, but still has an abundance of fish.