Kolyma Mountains

The Kolyma Mountains or Kolyma Upland (Колымское нагорье), is a system of mountain ranges in northeastern Siberia, lying mostly within the Magadan Oblast, along the shores of the Sea of Okhotsk in the Kolyma region. It constitutes the watershed between the basins of Kolyma River and of the Sea of Okhotsk / Pacific Ocean.

The range's highest point is Mount Nevskaya (гора Невская) in the Omsukchan Range at 1828 m.

Geography
The Kolyma Mountains stretch 1300 km on a NW-SW alignment and consists of a series of plateaus and ridges punctuated by granite peaks that typically range between 1500 to 1800 m.

To the west and southwest the Upper Kolyma Highlands are bound by the Seymchan-Buyunda Depression to the north and the Ola river basin to the south. The Yukaghir Highlands, highest point Mount Chubukulakh, rise to the northwest, the Anadyr Highlands to the north and northeast and the Koryak Highlands to the east.

Subranges
Besides the Omsukchan Range, the system of the Kolyma Mountains comprises a number of subranges. Most are located in Magadan Oblast:


 * Korkodon Range, highest point 1760 m
 * Kongin Range, highest point 1561 m
 * Molkaty Range, highest point 1663 m
 * Kilgan Massif, highest point 1098 m
 * Maymandzhin Range, highest point 1809 m
 * Kedon Range, highest point 1639 m
 * Molongdin Range, highest point 1644 m (the eastern end is in Kamchatka Krai)

The northernmost ranges are located in the Chukotka Autonomous Okrug
 * Kuryin Range (курьинский кряж), highest point 1030 m
 * Oloy Range, highest point 1816 m
 * Ush-Urekchen, highest point 1685 m

Hydrography
Many right tributaries of the Kolyma River have their sources in the northern and northwestern slopes of the Kolyma Highlands, including the Bakhapcha, Buyunda, Balygychan, Sugoy, Korkodon —with its tributary Bulun, and the Omolon —with its tributaries Molongda, Oloy, Kedon and Kegali. The rivers originating in the southern and southeastern slopes of the mountain area flow into the Sea of Okhotsk and are shorter: Ola, Yama, Gizhiga, Paren and Penzhina.