Billed as the nation’s premier outdoor sports and music festival, this popular weekend along the riverfront features biking, bouldering, climbing, slack line and trail running. Also featured are music and everyone’s favorite: ultimate air dogs. This year’s musical offerings include: Cris Jacobs Band on Friday, local rapper McKinley Dixon, Minor Poet, plus visiting D.J. Williams’ Shots Fired and Saturday headliners Sister Sparrow and the Dirty Birds and the Wood Brothers. Black Janis, Sid Kingsley and Agents of Good Roots close things out on Sunday. Expect a whole lot of people. Free. For the complete schedule, visit riverrockrva.com.