Universal Studios Hollywood’s Halloween Horror Nights is an electrifying after-dark event that turns the park into a fear‑filled playground from early September through early November. Each night, guests brave elaborately-themed haunted houses, creep through immersive scare zones, ride the infamous Terror Tram on the backlot, and enjoy thrilling live shows—all while the park’s main attractions remain open. With adrenaline-pumping rides, spooky treats, and exclusive merchandise, HHN delivers a fully immersive horror experience designed for fans aged 13 and up. Whether you’re drawn by blockbuster film‑inspired mazes, original frights, or night‑time thrills, Halloween Horror Nights is Hollywood’s ultimate scream‑fest.