The Kolyma Mountains or Kolyma Upland, 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 in the Omsukchan Range at 1,828 meters.