The
Sivalik Hills is a mountain range of the outer
Himalayas also known as
Manak Parbat in ancient times. Shivalik literally means 'tresses of
Shiva’. This range is about long enclosing an area that starts almost from the
Indus and ends close to the
Brahmaputra, with a gap of about between the
Teesta and
Raidak rivers in
Assam. The width of the Sivalik Hills varies from , their average elevation is .