The lake is in Zarasai and Rokiskis districts in Sartai Regional Park. It is the fifth largest lake in Lithuania, which is highly branched, narrow, valley origin (6 intersect rinos) complex configuration. The banks are up to 30 m. Sartai area - 1,350 ha, the deepest place - 22 m, the average depth - 5,72 m, the winding coastline - 80 km. Dominated by the bottom of the sludge, only on