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3 adults-only Halloween events near Los Angeles + Orange County with 2026 dates confirmed on their official sites, across 2 towns. The earliest to open is Delusion: Den of The Mosquito, on September 17. Each venue sets its own age rule, shown on every listing: bring ID.
Adults-only Halloween craft beer festival at the OC fairgrounds: 100+ beers, ciders and seltzers, live bands and a DJ, with costumes encouraged and an after-party to close the night.
Adults-only haunted pub crawl through Hollywood, pairing ghost stories and dark local history with stops at bars along the route.
Immersive horror-theater experience (not a walkthrough maze) set in a 1920s New Orleans brothel, at the historic Beckett Mansion; guests play characters in a 50-minute interactive story.
Boo Ha Ha - A Haunted Homecoming, Delusion: Den of The Mosquito and LA Ghosts Boos and Brews Haunted Pub Crawl. Each has its 2026 dates, hours and prices on its own page.
The earliest in this guide is Delusion: Den of The Mosquito on September 17, 2026.
21+: Boo Ha Ha - A Haunted Homecoming and LA Ghosts Boos and Brews Haunted Pub Crawl. 18+: Delusion: Den of The Mosquito. Age rules are from each official site.
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