Dayan Lake (Mongolian: Даян нуур), located in Sagsai Soum, Bayan-Ölgii Province of western Mongolia. It is recognized by BirdLife International as an Important Bird Area since 2009. It is located in the Altai Tavan Bogd National Park.
Max. length 18 km (11 mi)
Max. width 9 km (5.6 mi)
Surface area 67 km2 (26 sq mi)
Average depth 2.3 m (7 ft 7 in)
Max. depth 4 m (13 ft)
Water volume 0.157 km3 (127,000 acre⋅ft)
Surface elevation 2,232 m (7,323 ft)
Frozen : October to June
The average temperature is -5 °C. The warmest month is August, at 14 °C, and the coldest is December, at -24 °C. The average rainfall is 278 millimeters per year. The wettest month is July, with 55 millimeters of rain, and the driest is February, with 6 millimeters
HOW TO REACH:
BY AIR :
BY ROAD :
In the area, there are wolves (Canis lupus), red foxes (Vulpes vulpes) and Pallas’s cat (Felis manul). From the lake area, there is a view of the Altai Mountains; potentially the place may turn out to be interesting from the point of view of ecotourism.
Due to the six species of birds breeding in the surrounding areas, the lake, along with Khar Lake south-east of Dayan lake and coastal areas, was considered a bird sanctuary. Six species nest around the lakes that BirdLife has identified as key. One, the saker falcon (Falco cherrug), is in danger of extinction, and the white-throated bush chat (Saxicola insignis) is in danger. The other three are considered to be of least concerns; they include: northern lapwing (Vanellus vanellus), lesser kestrel (Falco naumanni) and bar-headed goose (Anser indicus).