| Biryuk | |
| Other Name: | Бирюк / Бүүрүк |
| Source1 Coordinates: | 61.5414°N 119.0864°W |
| Mouth Location: | Near Biryuk village |
| Mouth Coordinates: | 60.2539°N 119.6028°W |
| Subdivision Type1: | Country |
| Length: | 267km (166miles) |
| Discharge1 Avg: | 23m3/s |
| Basin Size: | 9710km2 |
| Pushpin Map: | Russia Sakha Republic |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
The Biryuk (Russian: Бирюк; Yakut: Бүүрүк, Büürük) is a river in Yakutia (Sakha Republic), Russia. It is a tributary of the Lena with a length of 267km (166miles) and a drainage basin area of 9710km2.
The river flows across an uninhabited area of the Olyokminsky District. Biryuk village is located by its left bank, close to its confluence with the Lena 52km (32miles) from Olyokminsk.[1]
The Biryuk is a left tributary of the Lena. It is formed in the Lena Plateau. The river heads in a roughly southern direction across a taiga area. In its lower course it bends to the south before the Lena floodplain and flows slowly and meandering in a swampy channel. Finally it meets the Lena 2160km (1,340miles) from its mouth near Biryuk village and 18km (11miles) downstream from the mouth of the Cherendey.[2]
The largest tributary of the Biryuk is the 144km (89miles) long Melichan (Меличан) that joins it from the right. There are lakes in its basin, including relatively large Ebye Kyuel. The river freezes yearly between October and May.[3]
