The Tirur River or Tirur-Ponnani River begins in the Tirur taluk village of Athavanad in the Malappuram district of the state of Kerala in south India and flows south-west to Thirunavaya and then north-west to Elamkulam where it turns south-west at Alinchuvadu and passes through Tirur town, and finally joins the Bharathapuzha River, which flows into the Arabian Sea near the coastal town of Ponnani. It is known for its beautiful mangroves and its many varieties of fishes and birds.