This Lineup Will Say BOO in Seattle

BOO! The global dance music experience curator Insomniac announced the return of its annual Halloween music festival, BOO Seattle, to WAMU Theater in Seattle, WA. Taking place on Halloween weekend, Friday, October 30 and Saturday, October 31, the two headlining artists for the festival have today been revealed: Detroit-based DJ and producer GRiZ and dubstep powerhouse Subtronics. With leads like that, we know the rest is going to be awesome!

For its fifth edition, BOO Seattle continues to cement itself as a mainstay in the Pacific Northwest’s live music landscape. With over 45 artists spanning three stages to be announced in the coming months, the 2026 edition of BOO Seattle promises to deliver its largest lineup yet. Standout names from past editions of the festival include GRAMMY Award-winning artist Zedd, Forbes “30 Under 30” favorite Marshmello, Chicago-native electronic music pioneer Kaskade, and long-time EDM household name Afrojack – to name a few. So we know it’s going to change the Seattle landscape.

Additional BOO Seattle 2026 details will be announced in the coming months, including the full lineup, stage programming, culinary vendors, and transportation logistics. 

Two-day GA and 21+ VIP passes are available now on BOO Seattle’s official website. VIP Headliners can elevate their experience with expedited entry, exclusive viewing areas, and premium food and beverage options throughout the festival. VIP access is 21+ only. Sign up for access to the presale at insom.co/BOOSEATTLE.