At 91-years-old, Willie Nelson is now slowing down. He’s hitting the road this summer with fellow icon Bob Dylan. The two will headline the tenth anniversary edition of the Outlaw Music Festival. It kicks off May 13th in Phoenix and wraps up September 19th in East Troy, Wisconsin. Nelson and Dylan will be joined by a rotation of acts, like Billy Strings, Sheryl Crow, Wilco, and Turnpike Troubadours. Tickets go on sale Friday.