Ulken Azhbolat

Ulken Azhbolat (Үлкен Әжболат; Большой Ажбулат, Bolshoy Azhbulat) is a bittern salt lake in Uspen District, Pavlodar Region, Kazakhstan.

The lake lies 100 km to the NNE of Pavlodar town, 45 km north of Uspenka, the district capital, and 10 km west of Lozovoye. There are mirabilite deposits in the lake area.

Geography
Lake Ulken Azhbolat is an endorheic lake located in the Kulunda Steppe, southern part of the West Siberian Plain, west of the Russian border. There is an elongated island in the middle of the lake. The Burla river flows into the eastern lakeshore. In years of adequate rainfall the river reaches the lake, but in dry years it ends in Lake Bolshoye Topolnoye, located 22 km to the east, on the other side of the Kazakhstan–Russia border.

There are smaller lakes in the immediate vicinity of Ulken Azhbolat, including Kishi Azhbolat (Кіші Әжболат), an intermittent lake on the eastern side, as well as Lake Klevkino (Клевкино) on the southern. Lake Ulken Tobylzhan lies 45 km to the south, lake Burlinskoye 57 km to the ESE, lake Bolshoye Yarovoye 77 km to the southeast and lake Kyzyltuz 60 km to the northwest.