Chistik, Protected lake in Demidov District, Smolensk Oblast, Russia.

Lake Chistik is a water body located within Smolensk Lakeland National Park in central Russia. A forested landscape surrounds the shore, creating a quiet environment within the protected region.

Chistik lies in Demidovsky District, 2.5 km west of Przhevalskoye, and is one of the lakes within Smolensk Lakeland National Park, established in 1992. The lake is glacial and thermokarst in origin, covering 54 hectares at 181.9 m above sea level. Its single island, Bobrovyy, is named for the beavers living on it.

The lake's name comes from a Smolensk dialect word for a large, treeless sphagnum bog, not from the verb "to clean". The settlement 2.5 km to the east, Przhevalskoe, is named after the explorer Nikolai Przhevalsky, who was born in the area and is buried beside the lake there.

The nearest visitor hub is the settlement of Przhevalskoe, where you can obtain information about the park and area. Wear sturdy shoes as forest paths vary in condition depending on the season.

The lake's only island, Bobrovyy, takes its name from the beavers living on it. The island also holds many grass snakes, adders and common snakes, a concentration visitors rarely expect on such a small patch of land.