The patrons of Campodolcino are Saint John the Baptist and Saint Primus; the feast day listed for the municipality is 24 June, and the municipality holds the parish church of San Giovanni Battista.
The hamlet of Prestone, on the southern shore of the artificial lake of the same name, is known for its local Festa dei Boee, in the second week of August. The municipality also holds the Museo della Via Spluga e della Val San Giacomo.
