Coloween 2026: Colorado's Biggest 21+ Halloween Party Turns 19

Halloween lands on a Saturday in 2026. It will not again until 2037.

Coloween is 21+ and this is year nineteen. It takes over all of Bounce Empire in Lafayette, the world's largest indoor inflatable park. 50,000 square feet, 50 attractions. The place is normally full of kids on a Saturday afternoon. That night it belongs to 1,200 adults in costume.

Everything runs. The slides, the obstacle courses, the quarterback challenge, the 42-foot bounce dome. Grown adults go down a slide at 1AM in full costume. That is the party.

Colorado's top house music DJs play the 360 degree concert stage under a full concert lighting rig. Nine party rooms. Lasers, projection walls, disco balls, fog. $1,000 cash for the best costume.

Open bar all night, premium alcohol. Party runs 9PM to 3AM. The clocks go back that night, so 2AM happens twice. You get the extra hour.

One price covers all of it. $79 all in. No added fees, no service charge at checkout.

Coloween is the largest 21+ Halloween party in Boulder County and one of the longest running in Colorado. It sells out.

Saturday, October 31, 2026. Bounce Empire, 1380 S Public Rd, Lafayette, 25 minutes northwest of downtown Denver. Costume required. Tickets at coloween.com