John Summit + Dom Dolla are headed to Aspen 🏔️🎶 They’re set to headline Up In The Sky Music Festival at Buttermilk on Aug 7–8, 2026 — with Empire of the Sun, Parcels, Leon Thomas, Polo & Pan + more on the lineup. Get the full details on 303magazine.com. #UpInTheSky #Aspen #Buttermilk #JohnSummit #DomDolla