| Bulun | |
| Other Name: | Булун |
| Pushpin Map: | Russia Magadan Oblast |
| Pushpin Map Caption: | Mouth location in Magadan Oblast, Russia |
| Source1 Location: | Kongin Range Kolyma Mountains |
| Source1 Elevation: | 447m (1,467feet) |
| Source1 Coordinates: | 64.725°N 157.7331°W |
| Mouth: | Korkodon |
| Mouth Elevation: | 125m (410feet) |
| Mouth Coordinates: | 65.0636°N 154.8653°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Subdivision Type2: | Federal subject |
| Subdivision Name2: | Magadan Oblast |
| Subdivision Type3: | District |
| Subdivision Name3: | Severo-Evensky District, Omsukchansky District |
| Length: | 4280NaN0 |
| Basin Size: | 17000km2 |
| Progression: | Korkodon → |
The Bulun (ru|Булун), also known as "Rassokha", is a river in Magadan Oblast, Russia. It has a length of 428km (266miles) and a drainage basin of 17000km2. The Bulun is the longest tributary of the Korkodon, of the Kolyma basin. Its river basin is located in a discontinuous permafrost zone.[1]
The river flows across an uninhabited area of the Kolyma Mountains. Formerly there was a gold-mining settlement in its basin named Rassokha, but it was abandoned in the 1970s.
The Bulun is a right tributary of the Korkodon. Its source is in a small lake of the western slopes of the Kongin Range. The river flows first in a northern direction, bending towards the northwest. As it leaves the mountainous area, it bends towards the southwest in a floodplain fringing the southern side of the Yukaghir Highlands. The river flows slowly in its last stretch meandering strongly and the floodplain becomes wider, with swamps and oxbow lakes. There are also numerous small thermokarst lakes. At last the Bulun joins the right bank of the Korkodon 91km (57miles) from its mouth.[2] [3]
The main tributaries of the Bulun are the 156km (97miles) long Vizualnaya, the 132km (82miles) long Nenkal and the 254km (158miles) long Aly-Yuryakh from the right, as well as the 73km (45miles) long Nelgyu from the left. The river is frozen between early October and late May. There is a winter road running along the left bank.[1]
