The ecoregion stretches almost 1,800 km from west to east, forming a patchwork of sections that are mostly above in a series of mountain ranges from Lake Baikal to the Okhotsk Sea. This string of high-altitude zones roughly follows 56 degrees north latitude, and much of the tundra climate is due to altitude zoning. The individual mountain ranges include the Stanovoy Range and the Dzhugdzhur Mountains. The highest elevation is .