The Calore Irpino or Calore Beneventano or Calore River is a river in southwestern Italy. It rises from the Monte Cervialto, elevation above sea level, 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.