| Mullayar | |
| Source1 Location: | Kottamalai peak in the Periyar Tiger Reserve |
| Mouth Location: | Periyar at Mullakudy |
| Subdivision Type1: | Country |
Mullayar River is a tributary of the Periyar River, the longest river in Kerala. It originates at Kottamalai peak [1] in the Periyar Tiger Reserve. The Mullayar flows west through the reserve [2] and joins the Periyar at Mullakudy [1] just at the beginning of the Periyar lake formed by the Mullaperiyar dam.
