| Rassokha | |
| Other Name: | Рассоха |
| Pushpin Map: | Russia Sakha Republic |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
| Source1 Coordinates: | 69.0283°N 151.7319°W |
| Source1 Elevation: | 100m (300feet) |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Subdivision Type2: | Location |
| Subdivision Name2: | Yakutia |
| Length: | 786km (488miles) |
| Mouth Coordinates: | 69.5106°N 155.0525°W |
| Mouth Elevation: | 6m (20feet) |
| Progression: | Alazeya→ East Siberian Sea |
| Discharge1 Avg: | 38m3/s |
| Basin Size: | 27300km2 |
The Rassokha (Russian: Рассоха,[1] also Россоха; Yakut: Рассоха) is a river in the northeastern part of Yakutia, Russia. It is the major tributary of the Alazeya.[2]
The river is 786km (488miles) long. The area of its basin is 27300km2.
The Rassokha is formed by the confluence of the rivers Ilin-Yuryakh and Arga-Yuryakh in the Kolyma Lowland. The original sources of the uppermost river in the network are in the Ulakhan-Sis Range. The Rassokha flows across the Middle Kolyma District and the Lower Kolyma District in an area marked by permafrost, with numerous swamps and lakes. Finally it joins the left bank of the Alazeya 383km (238miles) from its mouth.[3]
The Rassokha has 145 tributaries that are longer than 10km (10miles) and in its basin there are 7,442 lakes with a total area of 3240km2.[3]
The river freezes in late September through early October and stays icebound until the end of May.
The forest tundra of the Rassokha basin, together with the Kondakov Plateau and the Suor Uyata and the Ulakhan-Tas, is part of the migration corridor of the Sundrun reindeer population.[4]