The Borulakh (; , 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 long, with a drainage basin of .Russian State Water Register - Borulakh
The river is not navigable. It usually freezes in October and stays under thick ice until June.
Course 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.Borulakh — Great Soviet Encyclopedia in 30 vols. / Ch. ed. A.M. Prokhorov - 3rd ed. - M, 1969-1978.
There are about 350 lakes in the river basin. The main tributaries of the Borulakh are the Kaltysy and Khatyngnakh.
See also List of rivers of Russia Yana-Oymyakon Highlands§Hydrography
References