BOO Seattle Costume Ideas: What to Wear in 2026

BOO's costume guidelines ban weapons or weapon accessories of any kind, real or fictional (including whips, lightsabers and fake props), violent props, large chains, spiked jewellery, and costumes that resemble police, SWAT, fire, security or medical uniforms. Gas masks and glass, metal or ceramic masks are not allowed, and any mask must be removable for inspection. Stuffed animals and dolls are also on the prohibited list. Check the full rules on seattle.boo-halloween.com.

Yes, but full-face makeup that makes you unrecognisable from your photo ID is not allowed. Liquid makeup cannot be brought in; only powder makeup is permitted for touch-ups. Do your look before you arrive and keep your face recognisable.

Yes. Glowsticks and glowing or illuminated costumes and jewellery are on the acceptable items list. LED gloves, LED microlights for light shows and red light-up wands are not.

BOO Seattle 2026 is on Friday 30 and Saturday 31 October at WaMu Theater, 800 Occidental Ave S, Seattle, WA 98134, from 5pm to 1:30am each night. Confirm details on seattle.boo-halloween.com closer to the event.

You must be 18+ to enter and 21+ for alcohol and VIP areas. A valid physical photo ID is required. Digital IDs, school IDs and expired IDs are not accepted, and vertical IDs are not accepted for alcohol purchase.

Late-October evenings in Seattle are usually cold and often wet, while the arena floor runs hot. Coat check is available for $10 per night, so bring a warm layer for the queue and check it inside. There is no re-entry, so plan everything before you go in.

Both work, and two nights gives you room for one of each. One-piece costumes are the easiest way through a strict security check, while mesh and cut-out rave sets run cooler on a packed floor.

Matching voodoo dolls make an easy couples costume. Groups can go as a coven of witches, a crypt of skeletons or a mix of devils and vampires. Browse couples and group costumes.

Closed, broken-in shoes you can dance in for eight hours, with enough grip for wet Seattle pavements outside. Save brand-new boots for another night.

WaMu Theater is a clear bag venue. Only clear bags up to 12" x 12" or small clutches up to 4.5" x 6.5" are allowed, fanny packs must be clear, and hydration packs can have only one compartment and must be empty on entry.

No. BOO bans props and weapon accessories of any kind, real or fictional. Choose a costume where the print does the work.

Order by 26 October for delivery before the weekend, and check our size guide first so a full-body costume fits right. See shipping information for delivery times to your area.