The Kallada River is one of two major rivers that flow through the Kollam District of Kerala, India. This River is formed by three Rivers, viz., Kulathupuzha, Chendurni and Kalthuruthy which join near Parappar in Thenmala by the side of the Trivandrm-Shencottah road. It travels for 121 km, flowing through Punalur, Pathanapuram, Kunnathur and Kallada before ending at Ashtamudi Lake. The Palaruvi Falls also feeds Kallada river. The Chalikkari Aar also joins Kallada a little downstream.