Big Gigantic have confirmed the full lineup for their Rowdytown event. In addition to Big Gigantic’s headlining set, the event will feature: Macklemore and Ryan Lewis, Dillon Francis, GRiZ and Raw Russ. The Colorado livetronica duo’s single-day event will take place at Morrison, CO’s Red Rocks Amphitheatre on September 29. It will be the first time Big Gigantic headlines the classic outdoor venue.