Byosyuke

The Byosyuke (Бёсюке; Бөөһүкэ) is a river in the Sakha Republic (Yakutia), Russia. It is one of the northernmost tributaries of the Lena. The river has a length of 152 km —263 km from the source of the Sakhandya— and a drainage basin area of 5780 km2.

The river flows north of the Arctic Circle across desolate areas of Bulunsky District. The nearest inhabited place is Kyusyur, located on the banks of the Lena, over 60 km northeast of its mouth. The Byosyuke is a destination for game fishing tours.

Course
The Byosyuke is a right tributary of the Lena. It has its origin on the western flank of the northern end of the Orulgan Range, Verkhoyansk Range system. The Byosyuke is formed at the confluence of the Meychan and Sakhandya rivers. It flows roughly northwestwards, parallel to the Tikyan, skirting the northern limit of the Dzhardzhan Range and descending into a floodplain in its middle course. Towards the end it bends westwards and then southwestwards, forking into two in its last stretch and joining the right bank of the Lena 296 km from its mouth.

The longest tributary of the Byosyuke is the 152 km long Meychan (Мэйчээн) from the right.