Pambar River originates near Anamudi in Idukki district of Kerala state in South India.

It traverses Turner's Valley in Eravikulam National Park and flows into the Chinnar Wildlife Sanctuary through the Taliar Valley between Kanthalloor and Marayoor Villages and eastwards through the sanctuary.

It is joined by seasonal rivulets and a few perennial streams originating from sholas in the upper reaches.

[2] The Chinnar forms the interstate boundary along the northwest edge of the sanctuary and becomes the Amaravati River in Tamil Nadu, reaches the Amaravathi Reservoir and Dam and eventually joins the Kaveri River near Karur.

[citation needed] The spectacular Thoovanam Waterfalls lie on the Pambar River deep within the Sanctuary.