Other prohibited items include speakers, chairs, glass of any kind (except perfume bottles), food (except for special dietary needs), water guns, luggage, prescription drugs (unless in original packaging), weapons, bottled or canned beverages (except sealed bottles of water), hard-side coolers, beach umbrellas, ...

California's Great America (and Great America in Gurnee, Illinois) maintains a strict list of prohibited items to ensure guest safety and a "family-friendly" atmosphere in 2026. Prohibited items include all weapons (knives, firearms, mace), illegal substances, and any form of alcohol. You are generally not allowed to bring in outside food or coolers, with exceptions made only for guests with specific dietary needs or for infant formula. Professional photography equipment, including tripods and "selfie sticks," is banned on rides and often restricted in common areas. From a clothing perspective, attire with offensive language, gang-related symbols, or overly revealing "swimwear" (outside the water park area) is not permitted. Additionally, drones or any unmanned aerial vehicles are strictly forbidden on or above the property. All guests must pass through a multi-layered security screening, including metal detectors and bag checks. In 2026, the park also enforces a "Chaperone Policy" for guests under 15, requiring them to be accompanied by an adult 21 or older after 4:00 PM, a policy aimed at maintaining order and safety during busier weekend and evening operating hours.