1860m) hills on the southern side of the Western Ghats, and flows entirely through Thiruvananthapuram district of Kerala.

The river flows along Attingal municipality, Karette, Palode, Vithura and Kallar.

Thiru Aaraattu Kavu Devi Temple, Kollampuzha that is connected with Travancore royal family is situated on the banks of this river.

The river is a major source of water for Municipalities of Attingal and Varkala.

[4] There is considerable tourism activities in the upper course of river especially at Meenmutty Falls and Thavakkal waterfalls.