Buir Lake, situated in Khalkh Gol Soum, Dornod Province, is located approximately 300 km east of Choibalsan city and around 980 km from Ulaanbaatar, the capital of Mongolia. It covers an expansive area of 21 km by 40 km, making it the fifth-largest lake in Mongolia, with a surface area of 615 sq. km.

During the summer season, Buir Lake becomes a popular destination for domestic travelers due to its sandy beach on the southeastern side and its relatively shallow warm water, averaging between 6 to 16 meters in depth. The lake is renowned for its abundant fish population, boasting 34 different species, including amur carp, grayling, lenok, mirror carp, golden carp, silver carp, and burbot, among others. Hunting is significant for twelve of these species. Since 1930, a fishing farm has been established at the eastern tip of the lake.

Birdwatchers will find Buir Lake to be a paradise, as it plays host to 37 species of sedentary birds and welcomes an impressive 199 species of migratory birds. The delta of the Khalkh Gol River, a tributary of Buir Lake, provides exceptional sights for birdwatching enthusiasts.

Buir Lake holds international significance in wetlands conservation and sustainable utilization, leading to its registration in the Ramsar List in 2004.

Notably, Buir Lake holds significance in terms of national boundaries, as it shares the longest water border of Mongolia with China. The lake enhances its natural beauty and diversity with the presence of the Orshuun River, which flows out of its waters.

Overall, Buir Lake offers a captivating blend of natural wonders, making it a captivating destination for nature lovers and those interested in exploring Mongolia’s diverse wildlife and wetland habitats.