Ganga Festival or Ganga Mahotsav is a five day long event held every year in association with the Dev Deepavali. It is celebrated during the Hindu month of Kartik Purnima (November-December) on the banks of  river Ganges on the belief that God come down from Heaven to take a bathe in the holy Ganges. The festival is really a celebration to rejuvenate and realize the earliest glory and elegance of the river Ganga.

The main attraction of the festival is the floating of the thousands of brightly-lit colourful earthen lamps on lotus leaves in the river at night which gives Ganges a mystic look. During the festive days, large number of devotees visits the bathing ghats in the Ganges and a holy dip by chanting the Vedic hymns. Various cultural programmes like boat race, martial arts etc have also been conducted as a part of the festival. The festival also offers an opportunity to the music and dance lovers to enjoy the lively performances of the famous artistes. Large number of people irrespective of castes, classes, communities, and nationalities, from all over the places attend this auspicious festival with great enthusiasm and happiness.