Grace Potter and the Nocturnals will return to Red Rocks Amphitheatre on September 20 for a headlining show with special guests Trombone Shorty & Orleans Avenue and Lake Street Dive. Last year GPN was a part of a triple bill at the famed Morrison, CO venue, as Tedeschi Trucks Band and JJ Grey flanked the Vermont group.

Fan pre-sale tickets for the show go on sale tomorrow at Noon. A general on-sale date has not been confirmed yet.