The Palni Hills (Tamil: பழனி மலை) (also Palani Hills) are a mountain range in Tamil Nadu state of South India. The Palani Hills are an eastward extension of the Western Ghats ranges, which run parallel to the west coast of India. The Palani Hills adjoin the high Anamalai range on the west, and extend east into the plains of Tamil Nadu, covering an area of 2,068 square kilometres (798 sq mi).