BOO Seattle 2026 Lineup Breakdown

GRiZ, Subtronics, Sara Landry, James Hype, Levity, TroyBoi and more bring Halloween back to WAMU Theater.

BOO Seattle returns to WAMU Theater on October 30 and 31, giving the Pacific Northwest its biggest Halloween electronic weekend again.

The 2026 lineup has a clear top line with GRiZ and Subtronics, but the strength is the spread underneath. BOO is not only booking one lane of bass or one lane of house. It is building a Halloween lineup for the whole region.

The bass side is heavy

Subtronics, Kayzo, Levity, LYNY, Ravenscoon, Samplifire, Space Laces, Vastive, YDG and The Masquerade give BOO a strong bass identity. That matters in the Pacific Northwest, where bass music has always moved well across Seattle, Vancouver and the wider festival corridor.

The house and techno side is stronger than usual

Sara Landry is the obvious hard techno standout, while James Hype, Joshwa, Walker & Royce, Westend, Hannah Laing, Elderbrook's DJ set, Taiki Nulight and Morgan Seatree give the festival more club-driven range.

That balance makes the weekend more useful for mixed groups. You can lean bass one night and house or techno the next without feeling like you picked the wrong festival.

Why BOO works in Seattle

Halloween festivals need more than a poster. They need crowd buy-in. BOO has that because the theme already matches the weekend, and WAMU gives the production enough room to feel bigger than a standard indoor show.

For Vancouver and Seattle fans, it also sits perfectly on the calendar. Summer festival season is over, but the region still wants one more destination weekend before winter.