[3] Mostovoye lies in the transition zone between the Ob Plateau and the Kulunda Plain.

The lake stretches roughly from WNW to ESE for approximately 11 kilometers (6.8 mi).

In the 1980s a canal was built connecting Mostovoye with the Grachevo and Chernakovo lakes, which brought about a decrease in the salinity.

[1][4] There is a cluster of smaller lakes and swamps stretching northeastwards from the eastern side up to Sitnikovo and Paklino, the largest of which is Chernakovo.

[2][1] There are forested areas close to the lake and reeds grow in some sections of the lakeshore.