Halloween Horror Nights 2025 California 2025.  — halloween horror nights (hhn) will return to universal studios hollywood in california select nights sept.  — when is halloween horror nights 2025?

The house for a quiet.  — universal studios hollywood has announced more details for this year’s halloween horror nights 2025, revealing all the new houses, the terror tram, and zones the guests can experience at the event, taking place on select nights from thursday, september 5 through sunday, november 3, 2025.