BOO! Seattle is the Pacific Northwest’s premier Halloween electronic music festival, delivering a spine-tingling blend of bass, beats, and immersive horror-themed production. Hosted by Insomniac Events, BOO! transforms Seattle’s WAMU Theater into a haunted rave haven each October, combining world-class electronic music with creepy visuals, costumed performers, and a fully immersive spooky atmosphere.

Featuring a diverse lineup spanning dubstep, house, trap, and bass music, BOO! Seattle has welcomed top-tier artists like Zomboy, SLANDER, Rezz, RL Grime, Subtronics, NGHTMRE, and Valentino Khan, turning Halloween weekend into an epic two-night celebration of sound and scares.

Whether you arrive as a ghoul, goblin, or glitter-covered rave monster, BOO! Seattle offers a safe and thrilling environment to dance, connect, and experience the magic of Halloween through the pulse of the underground.

Dress up. Turn up. Get haunted at BOO! Seattle.