[1] It constitutes the watershed between the basins of Kolyma River and of the Sea of Okhotsk / Pacific Ocean.

[3] The Kolyma Mountains stretch 1,300 kilometers (810 mi) on a NW-SW alignment and consists of a series of plateaus and ridges punctuated by granite peaks that typically range between 1,500 to 1,800 meters (4,900 to 5,900 ft).

[2] 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.

[citation needed] Besides the Omsukchan Range, the system of the Kolyma Mountains comprises a number of subranges.

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.