The Great Lakes Depression (Mongolian: Их нууруудын хотгор, Ikh Nuuruudyn Khotgor), also called the Great Lakes' Hollow, is a large semi-arid depression in Mongolia that covers parts of the Uvs, Khovd, Bayan-Ölgii, Zavkhan and Govi-Altai aimags. Bounded by the Altai in the West, Khangai in the East and Tannu-Ola Mountains in the North,it covers the area of over 100,000 km2 (39,000 sq mi) with elevations from 750 to 2,000 m (2,460–6,560 ft). Small northern parts of the depression are part of Russia.