Khurgan Lake is also surrounded by glacial moraines. It is 23 km long, 6 km wide and its shoreline is 71 km long. The depth of the lake relatively lower than Khoton lake’s and the deepest point reaches at 28 m. 60% of the total surface are the lake is more deeper than 4 m and 10% constitutes more than 12 meters in depth. Volume of the water is 536 million cubic meter and its shoreline has largely been cut. Landscape around the lake is very beautiful and picturesque, surrounded by snow-capped mountains, its shoreline has ancient moraine depressions and hills and its east shore has forest trees. The shoreline of Khurgan Lake is curved and its northern shore has full of peninsulas and bays. There are about 20 bigger and smaller islands of which the largest one Zaan Island cover 1.7 square km area. The islands are all moraine hills, 10-30 m higher than the lake surface. The lake water temperature is relatively low, 8.1̊ - 10.1̊C in June because of the lake is fed by snow, ice and glacial water. The lake water freezes in October through June with 1.3-1.6 m ice thickness.
khurgan and Khoton lakes, the second largest, are located in an intermontane tectonic depression in the northern part of Mongol Altai mountain range and joined by a 3 km long and 100-150 m wide channel called Sargaal. Geographically, Khoton Lake stretches from the northwest to southeast direction in the west side of Khurgan Lake while Khurgan Lake is located along the latitude.
Khoton and Khurgan lakes are also home to many species of red listed birds: whooper swan, goose, eagle, hooded crane and various species of ducks. During the migration, 1% of the flyway population of the birds: pelican, ruddy shelduck, northern lapwing and common goldeneyes regularly arrive to the site. The lakes belong to Altai Tavan Bogd National Park area and have been gained under state protection since 1996 according to decree number 4 of Mongolian State Great Khural.