There is NO ADMISSION CHARGE to the event! The St. Clair Riverfest is an exciting event with fun for the whole family! The annual St. Clair Riverfest will be held Friday, July 26 through Sunday, July 28, 2019 at Palmer Park in the City of St. Clair, Michigan. St. Clair Riverfest attracts all ages with the wide variety of activities. FREE concerts on Friday & Saturday, great food, vendors, and of course the boat races ending the festival on Sunday!