| Borulakh | |
| Pushpin Map: | Russia Sakha Republic |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
| Source1 Coordinates: | 66.6639°N 134.7167°W |
| Source1 Elevation: | ca 800m (2,600feet) |
| Mouth Coordinates: | 67.2444°N 135.5025°W |
| Subdivision Type1: | Federal subject |
| Length: | 316km (196miles) |
| Basin Size: | 9470km2 |
The Borulakh (Russian: Борулах; Yakut: Боруулаах, Boruulaax) is a river in the Republic of Sakha in Russia. It is a left hand tributary of the Adycha, of the Yana basin. It is 316km (196miles) long, with a drainage basin of 9470km2.[1]
The river is not navigable. It usually freezes in October and stays under thick ice until June.
The river begins in the Yana Plateau and flows all the way along it. It heads first roughly north strongly meandering in its middle and lower course then is bends to the northeast around the Tirekhtyakh Range mountain area. Finally it joins the Adycha downstream from the Nelgese, the largest tributary.[2]
There are about 350 lakes in the river basin. The main tributaries of the Borulakh are the Kaltysy and Khatyngnakh.