The Calore Irpino or Calore Beneventano or Calore river is a 108 km long river in southwestern Italy. It rises from Colle Finestra (1,060 metres above sea level), a mountain saddle between Monte Acellica and the Terminio sub-group in the Monti Picentini, sub-range of the Apennine Mountains. The river flows first in the province of Avellino, and then in that of Benevento, before flowing into the Volturno. In ancient times it was known as Calor.
