Uel-Siktyakh

The Uel-Siktyakh (Уэль-Сиктях; Юёл-Сииктээх, Yuyol-Siikteex) is a river in the Sakha Republic (Yakutia), Russia. It is one of the northern tributaries of the Lena. The river has a length of 247 km and a drainage basin area of 6630 km2.

The river flows north of the Arctic Circle across desolate areas of Bulunsky District. The nearest inhabited place is Siktyakh, located near its mouth. The name of the river comes from the Yakut "uel/siktyakh" (уэл/сиктях), meaning "wet/damp place".

Course
The Uel-Siktyakh is a right tributary of the Lena. It has its origin in the slopes of the Dzhardzhan Range, on the western flank of the Orulgan Range, northern Verkhoyansk Range system. The Uel-Siktyakh is formed at the confluence of the Yras-Siktyakh and Daldyndya rivers. It flows first roughly northwestwards. After leaving the mountains it bends and heads northeastwards across a floodplain. Towards the end it meanders strongly in a swampy area of the Central Yakutian Lowland dotted with lakes. Finally it bends westwards and joins the right bank of the Lena 383 km from its mouth, 22 km upstream of the mouth of the Kuranakh-Siktyakh.

The longest tributaries of the Uel-Siktyakh are the Atyrkan and the 43 km long Oymyakon, both from the right.