Terkhiin Tsagaan Lake (Mongolian: Тэрхийн Цагаан нуур, romanized: Terkhiin Tsagaan nuur, [tʰirˈçin t͡sʰaˈʁaɴ nʊːr]) is a fresh-water lake in the Khangai Mountains in central Mongolia, located in Tariat soum of Arkhangai province.

[2] The lake is located in Khorgo-Terkhiin Tsagaan Nuur National Park.

This resulted in reduction of wetlands areas by 23.5% and increase by 39.4% of sands and eroded lands surrounding the lake.

[3] An ancient time, a mother and son were living this land and they carried their drink water from small fountain from the deep of ground.

The top of "Uran mandal" mountain is Small Island that mentioned above.