Bur (river)

The Bur is a river in Yakutia, Russia. It is the second largest tributary of the Olenyok with a length of. Its drainage basin area is.
The river flows north of the Arctic Circle across a lonely, desolate area devoid of settlements. The river basin is mostly in Olenyoksky District, with the lower course section in Bulunsky District.

Course

The Bur is a left tributary of the Olenyok. Its sources are in a hilly area of the North Siberian Lowland, in the vicinity of the sources of the Udya and the Buolkalakh. It flows across a marshy floodplain with small lakes, meandering strongly and flowing roughly eastwards north of the Beyenchime. Finally it joins the left bank of the Olenyok river upstream of its mouth. The confluence is only a little downstream from the mouth of the Khorbusuonka in the opposite bank.
The river is frozen between early October and late May. The Bur has several very long tributaries, such as the long Ary-Ongorbut, the long Kyra-Khos-Toryuttyakh and the long Noyuo from the left, as well as the long Kyuntyukelyakh from the right.

The river flows north of the Arctic Circle across swamps and forest-tundra. The distribution of permafrost is continuous.
The waters of the river are clean. Among the fish species found in the Bur lenok, muksun, nelma, omul, whitefish, taimen, grayling and pike deserve mention.