The Dzhugdzhur (Russian: Джугджу́р) or Jugjur, meaning "big bulge" in Evenki[citation needed], are a mountain range along the western shores of the Sea of Okhotsk in the far east of Siberia.

The east range is bound by the northwest coast of the Sea of Okhotsk.

The southwestern half of the mountains is composed of gneiss and granite from the Precambrian, while the northeast contains Mesozoic shale and limestone as well as Cretaceous and Paleocene igneous rock.

[2] The coastal stretch of the range is populated by Japanese stone pine and Dahurian larch.

Parts of the range occupied by the Okhotsk-Manchurian taiga ecoregion contain swathes of Jezo spruce up to elevations of 1,300 m. The climate is wet and cold, with wet rainy summers and severe winters.