Ulakhan-Botuobuya
The Ulakhan-Botuobuya ( or Большая Ботуобуя; "Big Botuobuya"; , Ulaxan Botuobuya) is a river in Yakutia (Sakha Republic), Russia. It is a right hand tributary of the Vilyuy, with a length of  and a drainage basin area of . The river flows across mostly uninhabited territory of Mirninsky District. Botuobuyinsky Nasleg is located in its middle course. There is a pontoon bridge of the A331 highway stretch between Mirny and Udachny crossing the river just before its confluence with the Vilyuy. Course 
The Ulakhan-Botuobuya begins in the Lena Plateau at an elevation of . It flows first roughly eastwards and then northeastwards across the Vilyuy Plateau within a wide valley. Finally it bends again and heads northwards. The smaller Ochchuguy-Botuobuya runs roughly parallel to it further to the east. Finally the Ulakhan-Botuobuya joins the right bank of the Vilyuy  from its mouth, a few miles downstream of the Vilyuy Dam. The river freezes between October and late May. The largest tributary of the Ulakhan-Botuobuya is the  long Tas-Yuryakh (Таас-Юрэх) that joins it from the right. See also
List of rivers of Russia

References

External links
Fishing & Tourism in Yakutia

Rivers of the Sakha Republic