| Bolshoy Anyuy | |
| Name Other: | Большой Анюй |
| Map: | Kolyma-IT.png |
| Pushpin Map: | Russia Far Eastern Federal District |
| Pushpin Map Caption: | Location in the Far Eastern Federal District, Russia |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 693km (431miles) |
| Discharge1 Avg: | 267m3/s |
| Source1: | Anadyr Plateau |
| Source1 Location: | Chukotka Autonomous Okrug |
| Source1 Coordinates: | 66.6675°N 168.7433°W |
| Source1 Elevation: | 560m (1,840feet) |
| Mouth: | Anyuy |
| Mouth Location: | Sakha Republic |
| Mouth Coordinates: | 68.4619°N 160.8028°W |
| Mouth Elevation: | 0.2m (00.7feet) |
| Progression: | Anyuy→ |
| Basin Size: | 57200km2 |
| Tributaries Right: | Orlovka |
The Bolshoy Anyuy (Russian: Большой Анюй; "Great Anyuy") is a river in the Kolyma basin in Far East Siberia. Administratively most of the basin of the Bolshoy Anyuy and its tributaries belong to the Chukotka Autonomous Okrug of Russia.
It flows roughly westwards and passes through the sparsely populated areas of Chukotka, its valley forming the southern border of the Anyuy Range. The Maly Anyuy joins it from the north near the Sakha Republic border and the combined river (now called the Anyuy) properly flows about 20km (10miles) to meet the Kolyma at Nizhnekolymsk.
Its length is 693km (431miles) and its basin area 57300km2.[1]
In 1650, Mikhail Stadukhin and Semyon Motora found a portage from the upper Bolshoy Anyuy to the upper Anadyr (probably its Yablon branch). This became the main cossack route from the Kolyma to the Pacific.