Lake Boontsagaan

Böön Tsagaan Lake fills an enclosed basin between the Khangai and Gobi Altai mountains. Its chief inflow, the Baidrag River, descends from the southern slopes of the Khangai, but no surface river flows out of the lake. Plains and dunes surround the water, and old shorelines above its banks show that the lake once stood higher. Winter ice covers the lake until spring.