Mahananda River is one of the prime tributaries of the Ganga River in the eastern part of India. The origin of this mighty Mahananda River is from the extreme north of West Bengal from the stunning hills of Darjeeling at an elevation of 2100 km. Originating from this beautiful hill station the Mahananda River, then flows southwards through the fertile agricultural area of Bihar and enters West Bengal flowing past English Bazaar. From Darjeeling to Bihar and after entering through Uttar Dinajpur district in West Bengal, Mahananda River, then flows in the southeast direction in to Bangladesh, near Tentulia in Panchagarh District.
(Source: maps.google.com accessed on 10.06.2016)
One of the most interesting facts about the Mahananda forms in its upper course an important linguistic boundary between the Bengali and the Hindi speaking areas and communities. The Mahananda River is mainly fed by the monsoons and floods occur in this river as well. It has a low water level during the summers or winters.
(Source: www.indiatravelguide.com/bihar/mahananda-river.html accessed on 25.05.2016)