The patron saints of Castell'Alfero are Saints Peter and Paul, celebrated with the patronal feast on the weekend of the first Sunday of September in the Church of Santi Pietro e Paolo.
Between January and February, «Gianduja al sò pais» marks the start of Piedmontese Carnival with Gianduja and Giacometta of the Famija Turineisa. On 25 April, the Viviverde agricultural fair is held, and in early July the «Sulle orme di Gianduja» theatre review. From May to October, every fortnight, «Castelli Aperti» offers guided tours of the Castello dei Conti Amico and the 'l Ciar Museum; in June, at Callianetto, the Mixed Fry Festival is held, and on the first Sunday of August «Musica nelle Pievi» in the Romanesque church of the Madonna della Neve. The town also holds the Chapel of Santi Sebastiano e Rocco.
