River Ganges is the longest river in India, The origin of river Ganges lies at the height of 13800 feet in the mountain ranges of Himalayas, in Tehri Garhwal, near Gangotri.
The cave from which river Ganges, originates is called Gomukha ,known as Bhagirathi. It is known as Bhagirathi in this region. River Ganges gets water from the melting snow of Nanda devi, Gurla, Mandhata, Dhaulagiri, Gesaisthan, Kanchenjunga and Mount Everest. Many small and big rivers merge with the Ganges in the Himalayan region.

From, the point of her origin up to Badrinath in the eastern region, the Ganges is known as Vishnu Ganga. In the western region it is the Dhaula Ganga of the DronaGiri.Dhaula Ganga merge with Vishnu Ganga near Joshi Math and this combined stream is known as Alaknanda. After Rudraprayag river Ganges enters Rishikesh and after that she turns toward Haridwar which is situated in south-West direction from Rishikesh. At Allahabad river Yamuna merge with river Ganges. In the ancient times there was also another river named Sarswati which merged at Allahabad , but it has now become extinct. This union of three rivers at Allahabad is also known as Triveni.

After Prayag the Ganges reaches Varanasi. Later on this river Gomati merge with the Ganges. After that the Ganges enters the state of Bihar. Near Patna river Gandak coming from Nepal also merge into the Ganges. One stream is known as 'Hughli' and ultimately merges into the 'Bay of Bengal'.

The Ganges travels a distance of 1557 miles beginning from the point of origin till she ultimately merge into the ocean.