Riot Fest is celebrating its 20th anniversary this weekend in Douglass Park, Chicago, from Friday to Sunday. The festival features headliners like Blink-182, Weezer, and Green Day, alongside a diverse lineup including Jack White, Idles, and Alkaline Trio. Attendees can expect music from 11 a.m. to 10 p.m. daily, with tickets still available for one- and two-day passes.