The Sesia (Latin Sesites or Sessites) is a river in Piedmont, north-western Italy, tributary to the Po. Geography Its sources are the glaciers of Monte Rosa at the border with Switzerland. It flows through the Alpine valley Valsesia and the towns Varallo Sesia, Quarona, Borgosesia and Vercelli. The Sesia flows into the Po River near Casale Monferrato. Main tributaries Left hand tributaries: Sermenza, Mastallone, Pascone, Strona di Valduggia. Right hand tributaries: Sorba, Sessera, Cervo, Naviglio di Ivrea, Bona, Marcova, Roggia Stura. Sport and leisure It is a popular river for kayaking and hosted the European championship in 2001 and the world championship in 2002. See also Sesia (département), First French Empire References External links Photos Rivers of Italy Rivers of the Province of Novara Rivers of the Province of Vercelli Rivers of the Province of Alessandria Rivers of the Province of Pavia Rivers of the Alps Braided rivers in Italy