Clarkston’s annual music festival, Rockin’ on the River, has announced that Blues Traveler will headline this year’s event.The concert is scheduled for 4 p.m. July 29, 2017. Opening acts are Seven Devils and Royal Bliss. Tickets are $32 in advance and available at A&B Foods locations and Rosauers in Lewiston; and Heights Family Foods in Clarkston. Tickets are $40 at the gate. Kids ages five and under are admitted free with a paying adult.