Six Flags Great America in Gurnee has announced plans to celebrate its 50th anniversary in 2026. (Photo provided by Six Flags Great America)Time is running out to experience Six Flags Great America’s 50th anniversary celebrationGuests have until Aug. 9 to enjoy limited-time entertainment, specialty food offerings, and exclusive anniversary experiences celebrating 50 years of thrills and family memories. Anniversary food and beverage offerings – Limited-time menu items including Italian beef loaded tater tots, specialty pizzas, a birthday cake funnel cake and more. Guests can sample multiple offerings with a 50th Anniversary Food Sampler Pass. Guests can sample multiple offerings with a 50th Anniversary Food Sampler Pass.