Korayar River is one of the tributaries of the river Kalpathipuzha, which in turn is a main tributary of the Bharathapuzha River, the second-longest river in Kerala, south India. It originates from Anamalai, Tamilnadu and merges with the Walayar which later converges with the Bharathapuzha at Pattambi.
References
See also Bharathapuzha - Main river Kalpathipuzha - One of the main tributaries of the river Bharathapuzha
Other tributaries Korayar Varattar Walayar Malampuzha