Palar (Tamil: பாலாறு, Kannada: ಪಾಲಾರ್ ನದಿ, Telugu: పాలార్ నది, Sanskrit: पयस्विनी नदी) is a river of southern India. It rises in Nandi Hills, India in Kolar district of Karnataka state, and flows 93 kilometres (58 mi) in Karnataka, 33 kilometres (21 mi) in Andhra Pradesh and 222 kilometres (138 mi) in Tamil Nadu before its confluence into the Bay of Bengal at Vayalur about 100 kilometres (62 mi) south of Chennai. It flows as a Guptagamini (underground course) for a long distance only to emerge near Bethamangala town, from where, gathering water and speed, it flows eastward down the Deccan Plateau. The cities of Ramanaickenpet, Vaniyambadi, Ambur, Gudiyatham, Vellore, Melvisharam, Arcot, Walajapet (Anaicut), Kanchipuram, and Chingleput are located on banks of Palar River.