Buir Lake (Mongolian: Буйр нуур) is a freshwater lake in Mongolia and partly in Inner Mongolia, China. It lies within the Buir Lake Depression. Together with Hulun Lake (Dalai Lake), it gives the name to Hulun Buir steppe and region.[1]
In 1388, Ming forces under Lan Yu won a major victory over the Northern Yuan Dynasty on the Buir Lake region. Northern Yuan ruler Tögüs Temür tried to escape but was killed shortly afterwards.[2]