[1] Bolshoye Ostrovnoye is an endorheic lake that lies within one of the wide ravines of glacial origin cutting diagonally across the Ob Plateau.

The lake has an irregular shape, stretching roughly from northeast to southwest for over 18 kilometers (11 mi).

[1] The ribbon pine forest characteristic of the Ob Plateau flanks the eastern side of Bolshoye Ostrovnoye.

Pike, crucian carp and roach are still to be found in its waters, however, in recent decades species such as tench, peled and perch have disappeared owing to eutrophication.

The facility was abandoned about 25 years ago, but currently there are plans to revive it and stock the lake with fish.