Lineup Announced For Riot Fest Denver Travis Faulk 10 years ago The lineup has been announced for the Denver dates of Riot Fest. Riot Fest & Sideshow Denver will be held September 19-21 at May Farms in Byers, Colorado. Tickets are on sale now. Share this: Riot Fest Announces New Venue For DenverRiot Fest Announce 2015 Toronto, Chicago, Denver DatesDenver Riot Fest Organizers Denied Permit, Plan to Announce New Location