Nandakini
Nandakini is a river and is one of the six main tributaries of the Ganges. Originating in the glaciers below Nanda Ghunti on the Nanda Devi Sanctuary, the river joins the Alaknanda at Nandprayag (870m), which is one of the panch prayags or holy confluences on the Alaknanda. It Flowing through the Chamoli district of Uttarakhand, this river traverses a distance of around 105 kilometers before eventually converging with the Alaknanda River. How to reach Nandakini River 
The Nandakini River enjoys convenient connectivity with key cities in Uttarakhand. Accessible options include the nearby Jolly Grant Airport in Dehradun, situated around 220 kilometers away. Once at the airport, travelers can choose between hiring a taxi or utilizing a bus service to comfortably reach the Nandakini River. Alternatively, if train travel is preferred, the closest railway station is Rishikesh, located approximately 200 kilometers away. From Rishikesh, arranging a cab or taking a bus presents a convenient way to reach the Nandakini River. References

Tributaries of the Ganges