A haunted rave festival with immersive production, electronic music and Halloween-themed entertainment at WaMu Theater.
BOO Seattle takes over WaMu Theater on Friday, October 30 and Saturday, October 31, 2026. It's a two-night run on Halloween weekend, with both nights running from 5 PM to 1:30 AM. The whole thing is built around a haunted mansion theme, combining electronic music with immersive production and Halloween mayhem.
BOO bills itself as the most devilish Halloween festival in the Pacific Northwest, and it leans into a "haunting rave tradition" of paranormal activity and music where crowds gather "in the light of the night." That's the core of it: a haunt that doubles as a rave, with the music and the immersive elements running side by side rather than one taking the lead over the other.
If you're trying to get a feel for what this looks like in practice, there's a 2025 after-movie called Beyond Day Trip available to watch. It gives a good sense of the scale and the production they bring to the venue, so you can see how the haunted house and the dance floor work together before you commit to a night.
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Practical stuff: entry is 18+, but you'll need to be 21 for alcohol and VIP areas. Both nights run from 5 PM to 1:30 AM at WaMu Theater, 800 Occidental Ave. S, Seattle, WA 98134.
