The Sivalik Hills, also known as Churia Hills, are a mountain range of the outer Himalayas that stretches from the Indus River about eastwards close to the Brahmaputra River, spanning across the northern parts of the Indian subcontinent. It is wide with an average elevation of . Between the Teesta and Raidāk Rivers in Assam is a gap of about . In some Sanskrit texts, the region is called Manak Parbat. Sivalik literally means 'tresses of Shiva'. Sivalik region is home to the Soanian archaeological culture.