Seattle Halloween Events 2025 Dates. Boo seattle halloween 2025 turns the night alive on october 25th and 26th at the wamu theater, 800 occidental ave s, seattle. The boo seattle halloween spooktacular continues it's haunting rave tradition at wamu theater!
Crypticon seattle is the ultimate horror convention, featuring celebrity guests, panels, vendors, and more. Join the city’s largest costume bash with live djs, multiple.