# Olguydakh

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The **Olguydakh** (Russian: Олгуйдах; sah: Олгуйдаах), is a river in [Yakutia](/source/Yakutia) ([Sakha Republic](/source/Sakha_Republic)), [Russia](/source/Russia). It is a left hand tributary of the [Akhtaranda](/source/Akhtaranda), part of the [Vilyuy](/source/Vilyuy) basin. The river is 191 kilometres (119 mi) long and has a [drainage basin](/source/Drainage_basin) of 5,450 square kilometres (2,100 sq mi).[1]

The river flows across an uninhabited sector of [Mirninsky District](/source/Mirninsky_District).[2][3] An area where mysterious events reportedly took place lies near the abandoned [Olguydakh village](/source/Olguydakh_(village)) on the banks of the lower course of the river.[4]

## Course

The Olguydakh belongs to the upper stretch of the Vilyuy basin. It originates in the northeastern end of lake [Toymoku](/source/Toymoku) (sah: Тоймоку) of the [Vilyuy Plateau](/source/Vilyuy_Plateau). The river heads first northwards for a short stretch, then it bends and heads roughly southeastwards and southwards, [meandering](/source/Meandering) slightly for the remainder of its course. There are many small lakes in its basin.[2] In its last stretch the Olguydakh turns to the southwest. Its mouth is at the confluence with the 227 km (141 mi) long [Alymdya](/source/Alymdya) from the right to form the [Akhtaranda](/source/Akhtaranda), 75 km (47 mi) from its mouth in the [Vilyuy Reservoir](/source/Vilyuy_Reservoir).[5] There is a bridge of the [Aykhal](/source/Aykhal)—[Chernyshevsky](/source/Chernyshevsky,_Sakha_Republic) highway over the Olguydakh.[6]

### Tributaries

The main tributary of the Olguydakh is the 80 kilometres (50 mi) long [Aallaakh](/source/Aallaakh) (Ааллаах) from the left. The river freezes in mid October and stays under ice until mid May.[1]

### Paranormal claims

Claims have been made dating back to the middle of the 19th century regarding large, copper, dome-shaped objects ("cauldrons" or "boilers," *[Yakut](/source/Yakut_language): олгуй*) found in a region along the river known as the [Valley of Death](/source/Valley_of_Death).[4] The alleged radioactive-like sickness hunters who spent the night in these cauldrom led to the area being deemed cursed by the local [Yakut](/source/Yakuts) and given the name of Yelyuyu Chörköçüökh ([Yakut](/source/Yakut_language): *Өлүү Чөркөчүөх)*. A number of expeditions to Olguydakh and surrounding regions which report these stories have been made, such as those from [Richard Maack](/source/Richard_Maack) and [Ivan Mackerle](/source/Ivan_Mackerle).

## See also

- [List of rivers of Russia](/source/List_of_rivers_of_Russia)

## References

1. ["Q-49-50 Topographic Chart (in Russian)"](https://maps.vlasenko.net/smtm1000/q-49_50.jpg). Retrieved 20 April 2023.

1. ["P-49-50 Topographic Chart (in Russian)"](https://maps.vlasenko.net/smtm1000/p-49_50.jpg). Retrieved 20 April 2023.

1. [Mysteries of Siberia's 'Valley of Death'](https://www.bibliotecapleyades.net/ciencia/esp_ciencia_tunguska09a.htm)

1. [Nature.ykt](https://web.archive.org/web/20080613135136/http://www.nature.ykt.ru/RIAC/Yakutia_geogr/014.htm#%D0%9E%D0%BB%D0%B3%D1%83%D0%B9%D0%B4%D0%B0%D1%85)

1. [Google Earth](/source/Google_Earth)

## External links

- [Copper boilers in the swamps of Siberia.](https://iia-rf.ru/en/kids/mednye-kotly-v-bolotah-sibiri-vilyuiskie-kotly-doistoricheskii-atomnyi/)

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Adapted from the Wikipedia article [Olguydakh](https://en.wikipedia.org/wiki/Olguydakh) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Olguydakh?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.