The Gobi Lakes Valley desert steppe ecoregion covers the narrow, flat valley in southwestern Mongolia that lies between the Khangai Mountains, and the Gobi-Altai Mountains. The region is known as the "Valley of the Lakes" because runoff from the mountains collect in lakes that have no outlet to the sea. Although the valley is a semi-arid desert steppe, it has areas of wetlands near the lakes that are important habit for water birds.