Six Flags Great America's fall lineup includes Fright Fest, Oktoberfest Food Festival
Six Flags Great America in Gurnee unveiled its fall lineup, featuring the return of Fright Fest, three new haunted houses, and family-friendly activities like Kids Boo Fest, running from Sept. 14 to Nov. 3. GURNEE, Ill. - Six Flags Great America in Gurnee just unveiled its exciting and thrilling fall lineup for the season!