Lake Chyortovo

Lake Chyortovo or Lozil-To, also known as "Chertovo" (Чёртово озеро, meaning "Devil's Lake" ; Selkup: Лозыль'-то) is a freshwater lake in Yamalo-Nenets Autonomous Okrug, Russia.

The lake is a traditional sacred site for the indigenous Selkup people of the region. Legend says the lake is so deep it has no bottom.

Geography
Chyortovo is located north of the Arctic Circle, in the southeastern part of the okrug. It is a chain of lakes roughly aligned from west to east. They are connected with each other by streams. The westernmost one at 64.2°N, -79.91667°W is known as "Upper Chyortovo". It has an hourglass shape and an island in the northern part. The largest lake is at the eastern end. The lakes' outflow is the Tolka, a left tributary of the Taz, which flows very close to the east.

A number of rivers flow into the lake, such as the 106 km long Pokotylky, the 30 km long Motylky, the 27 km long Orylky, the 91 km long Marylky, the 42 km long Kytylky, the 131 km long Kanylky, the 11 km long Sipalky, the 36 km long Chebakky and the 34 km long Tochipylky, among others.

Fauna
Among the fish species found in the lake, the tugun (Coregonus tugun) is much appreciated.