The Volga River flows through the lake in its upper course.

The lake has a surface area of 30.4 square kilometres (11.7 sq mi).

The southern end of the lake is located by the village of Zabelino.

The wooden Church of the Nativity of Saint John the Baptist (1694) at the village of Shirkovo, classified as a cultural heritage monument of the federal significance, is located at the bank of the lake.

The drainage basin of the lake includes the northwestern part of Ostashkovsky District and the northern part of Penovsky District.