Bayan-Ölgii (= Rich cradle/region) is the most western aimag or province of Mongolia, sharing borders with both Russia and China. It is the highest Mongolian aimag, mostly located in the Mongolian Altay mountains, with the Khüiten Peak in the Tavan bogd massif the highest point at 4,374 metres. The province has a total area of 45,704.89 km².
Most of the 93,000 inhabitants of Bayan-Ölgii are ethnic Kazakhs, making up almost 90% of the population. The Kazakhs practice eagle hunting and each year in early October Ölgii hosts the Eagle Festival, with traditional displays, horse games and camel races. In September the village of Sagsai, 27 kilometres tot the west of Ölgii., has the Altai Eagle Festival with a similar program. The region near Sagsai (Sagsai Sumiin Bigeeu) has numerous Kazakh eagle hunter families living in their yurts (called üy).
The capital, Ölgii, is a small town with a large central square, an interesting museum, a good market and a number of mosques. There are good places to stay, in ger camps and hotels.