| Ulakhan-Kyuegyulyur | |
| Other Name: | Улахан-Кюэгюлюр / Улахан Күөгүлүүр |
| Source1 Coordinates: | 69.8253°N 130.3467°W |
| Source1 Elevation: | 253m (830feet) |
| Mouth Coordinates: | 70.7169°N 133.4967°W |
| Subdivision Type1: | Country |
| Length: | 159km (99miles) |
| Basin Size: | 3630km2 |
| Pushpin Map: | Russia Sakha Republic |
| Pushpin Map Caption: | Mouth location in Yakutia, Russia |
The Ulakhan-Kyuegyulyur (Russian: Улахан-Кюэгюлюр; Yakut: Улахан Күөгүлүүр, Ulaxan Küögülüür) is a river in Sakha Republic (Yakutia), Russia. It is one of the major tributaries of the Omoloy. The river has a length of 159km (99miles) and a drainage basin area of 3630km2.
The river flows north of the Arctic Circle, across desolate tundra territories of the East Siberian Lowland. Its basin falls within Ust-Yansky District.
The Ulakhan-Kyuegyulyur is the largest right tributary of the Omoloy. It has its sources in the western slopes of the Kular Range of the Verkhoyansk Range system. The river flows roughly in a NNE direction flanking the feet of the range. After it descends into the East Siberian Lowland, it heads in a northern direction until the end of its course. The river flows roughly parallel to the Omoloy further west, meandering in the floodplain. Finally the Ulakhan-Kyuegyulyur joins the right bank of the Omoloy 127km (79miles) from its mouth. The confluence is 12km (07miles) upstream of Khayyr village.[1] [2]
The main tributary of the Ulakhan-Kyuegyulyur is the 100km (100miles) long Kuchchuguy-Kyuegyulyur on the right. The river is frozen between mid October and early June. There are more than 780 small lakes in its basin with a total area of 22km2.[3]
