Halloween Horror Nights Hollywood
3 Sep – 1 Nov 2026
The West Coast edition, with the Terror Tram running through the backlot.
Howl-O-Scream SeaWorld San Diego
A separately ticketed scare event on the bay.
San Diego's Howl-O-Scream runs select nights from mid-September with haunted houses, scare zones and themed bars. Sold as a hard ticket separate from regular admission.
Also in California
Knott's Scary Farm
17 Sep – 31 Oct 2026
The original theme park Halloween event, running since 1973.