Ayakkum Lake (; ) is a lake near the northern boundary of the Tibetan Plateau, to the southeast of the Kunlun Mountains. While many of the small glacier and snowmelt-fed streams on the Plateau give rise to major South-east Asian rivers (including the Mekong and Yangtze), some empty into saline lakes such as Lake Ayakkum. The lake is growing because of increased flows from small glacier- and snowmelt-fed streams.