Tim McGraw and John Rich will join Dierks Bentley when he hosts his third annual Miles & Music for Kids celebrity motorcycle ride and concert to benefit Vanderbilt Children's Hospital. Taking place Oct. 5, the hour-long ride begins south of Nashville and ends at Riverfront Park in downtown Nashville for a concert featuring the three stars. "This event has turned into one of the highlights of my year," Bentley said. "I can't think of a better way to spend an October day in Nashville than riding motorcycles in the afternoon and playing guitars and singing with some buddies at sundown. Everyone has been so supportive, and I'm really proud of the money we've been able to raise for Vanderbilt over the last few years." Additional artists are expected to be announced for the event.