Surface area: 26,841 ha
Elevation: 1,227-1,537 m

Protection status: Fully protected by Dariganga National Park.

Site description: The important area for birds, Ganga Lake is located on the borders of dry steppe and true desert zones in Dariganga soum, Sukhbaatar province. The site comprises small lake in the north valley of Moltsog sand dunes and three small lakes located in its east. There are many freshwater lakes, include Orgikhiin Bulag, Zegst, Duut, Erdene, Ulaan Toirom, Tsagaan, Kholboo and other small lakes, and sand dunes called  Moltsog, Ovoonii and Kholbogiin. Zegst and Duut Lakes are fed by Dagsin spring waters and surrounded by tall reeds. The site is characterized by steppe and desert vegetation zones. The increasing tourist numbers and State Ceremony to worship Altan Ovoo State Sacred Mountain that takes place ever 4 year, leading to gather many people and vehicles at the site, resulting to garbage pollution and increase of road trails. In 2004 the Ganga Lake nominated as a Ramsar Site.

Importance for birds: Globally threatened bird species such as Swan Goose (Anser cygnoides), Whitenaped Crane (Grus vipio) and Great Bustard (Otis tarda) occur at the site. Bird species of to the Eurasian steppe and desert biome are common here. Great Crested Grebe (Podiceps cristatus), Whooper Swan (Cygnus Cygnus), Swan Goose (Anser cygnoides), Ruddy Shelduck (Tadorna ferruginea), Common Shelduck (T. tadorna) and Demoiselle Crane (Anthropoides virgo) are gather in flocks, exceeding 1% of their flyway populations.

Special flora and fauna: Rare mammals such as Mongolian Gazelle (Procapra gutturosa), Siberian Marmot (Marmota sibirica), Red Fox (Vulpes vulpes), Corsac Fox (Vulpes corsac) and European badger (Meles meles) occur at the site.