Before attending Halloween Horror Nights (HHN) at Universal Studios Hollywood in 2026, the most critical thing to know is that the event is physically demanding and intensely crowded. You should prepare to walk between 13,000 and 17,000 steps, so supportive, closed-toe shoes are a non-negotiable requirement. In 2026, the event features a revamped "Costume Policy" that allows guests to dress up, but strictly prohibits masks, veils, long trains, or anything that obscures the face or resembles a weapon. Another "pro" tip is the "Stay and Scream" option; if you are in the park during the day, you can wait in designated holding areas to get a head start on the haunted houses before the general public is admitted at 6:30 PM. Given that wait times for popular houses can exceed 120 minutes, many visitors find the Universal Express Pass essential to see all 8–10 houses in a single night. Finally, remember that the event runs regardless of rain, and while it is terrifying, the "Scare Actors" are strictly prohibited from touching you, and you must extend the same respect to them to avoid immediate expulsion from the park.