Lake Koolen

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Koolen is located in Chukotka Autonomous Okrug
Location in Chukotka Autonomous Okrug, Russia
LocationChukotsky District, Chukotka Autonomous Okrug
Coordinates65°56′N 171°6′W / 65.933°N 171.100°W / 65.933; -171.100Coordinates: 65°56′N 171°6′W / 65.933°N 171.100°W / 65.933; -171.100
Native nameКоолень - Koolёn
Primary inflowsGytgykoymavaam, Endoyguem
Primary outflowsKoolenveyem
Basin countriesRussia
Max. length15 km (9.3 mi)
Max. width1.5 km (0.93 mi)
Surface area264 km2 (102 sq mi)
Max. depth100 m (330 ft)
Surface elevation42 m (138 ft)
FrozenFrom October to June

Koolen (Eskimo-Aleut languages: Koglu) is a lake of Chukotsky District, Chukotka Autonomous Okrug, Russia. Its name originated in the Chukchi word Koolёn, a fault or deep chasm.[1]


Koolen is a long and narrow lake located in the Inan Range area of the Chukotka Mountains, at the eastern end of the Chukotka Peninsula, 13 km from the coast of the Chukchi Sea.[2] The highest point near the lake is Mount Yttyvyt, a 939-metre-high (3,081 ft) mountain.

Koolen has a tectonic origin. Its water has a very weak content in minerals and is very transparent. The lake has a deep-blue tint and in the areas of greater depths the blue is so dark that it looks almost black. The area around the lake is uninhabited, the nearest town is Lavrentiya, located 44 km to the southwest.

1947 map of the Chukchi Peninsula

See also[edit]


  1. ^ Boris Zhulanov. My Stern, Gentle Koolen - Ural pathfinder, 1990, number 10, pp 56-59
  2. ^ "Ozero Koolen". Mapcarta. Retrieved 3 May 2016.

External links[edit]