Ugii is a fresh water lake  located in Ugii-Nuur sum, Arkhangai province.

 

Area: 25.7 km²

Altitude: 1,337 m

Length: 7.9 km

Width: 5.3 km

Mean depth: 6.6 m

Max. depth: 15.3 m 

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Ugii lake is a great place for fishing and bird-watching as there are over 150 species of migratory birds inhabiting here.