The largest lake amongst the three lakes surrounding Vecslabada village.
In the part of the lake, where there are many coves, there are 2 places where the depth reaches more than 5 metres. In the northern part there is a botanical protected area Islands of Istras Lakes. The lake with its islands and the surrounding landscape is a complex nature reserve. The area of the lake is 1.55 km2, area with the islands 1.64 km2, length 2.4 km, max. width: 1.3 km; average depth is 3.1 m, max. depth: 5.5 m.
A wonderful panorama is seen from the tower on the shore. Excursions upon request.