Things to Do on Halloween 2026 in Denver

Halloween 2026 lands on a Saturday — the first since 2020 — and that changes the math on how you spend the night. You can stay in with a bowl of candy, or you can treat the one adult holiday of the year like it means something. Below are the best things to do on Halloween in Denver, ranked by how good a story you’ll have the next morning — starting with the one worth building your whole night around.

1. Go to the big adult Halloween party

This is the pick. Coloween is Denver’s biggest Halloween party for adults — the biggest 21+ Halloween party in the state, with DJs and a room that goes off from the first hour. It’s 21+, so there’s no kids-in-costume shuffle and no early exit. You show up in your best costume, one ticket covers the whole production, and the night is built for people who take October 31 seriously. Nineteen years of doing exactly this means the party runs the way you want it to: no cover-charge surprises, no dead room at midnight.

The other reason it tops the list: the Coloween costume contest. If you’ve spent real time on a costume, this is where it pays off — a stage, a crowd, and cash on the line. Nothing else on this list gives your costume somewhere to go.

2. Hit a serious haunted house

If you want to be genuinely scared, Denver has some of the best haunts in the country. 13th Floor Haunted House is the heavyweight — multiple attractions, actors who commit, and lines that get long fast on the 31st. The Frightmare Compound in Westminster is the old-school pick locals swear by. Anderson Farms out in Erie runs Terror in the Corn, a haunted hayride and corn maze that hits different in the cold and the dark. Buy timed tickets ahead. Walk-up on Halloween night is a gamble.

The catch: a haunt is a 45-minute experience, not a night. Plenty of people do a haunted house early, then go somewhere the night actually keeps going.

3. Run a costume bar crawl downtown

LoDo and RiNo fill up with costumes on Halloween. A bar crawl gives you variety and the freedom to bounce, but you’re paying at every stop, waiting in every line, and hoping each bar is actually good. It works best in a big group that doesn’t mind splitting up. If you’d rather pay once and stay put, one ticket to a full production beats crawling in the cold — but the crawl is a real option if you like keeping things moving.

4. Do a Halloween movie night — the right way

Not everyone wants a crowd, and that’s fair. Alamo Drafthouse in Denver runs horror screenings all October with food and drinks at your seat, which beats a couch and a laptop. If you are staying in, build a real lineup instead of scrolling for an hour: one classic (Halloween, The Thing), one you’ve never seen, and one that’s more funny than scary to close it out. Low effort, low cost, and nobody judges your pajamas.

5. Daytime things to do on Halloween: patch or corn maze

Halloween on a Saturday means you get the whole day, too. Chatfield Farms and Anderson Farms run pumpkin patches, corn mazes, and hayrides during the day — good for families, or for burning the afternoon before the night gets going. This is the one that pairs with everything else: do the maze at 2 PM, and you’ve still got the whole evening open.

What are the best things to do on Halloween night?

Most people don’t pick just one. The strongest Halloween in Denver is a stack: maze or patch in the afternoon, a quick haunt at dusk, then the party for the part of the night you’ll actually remember. Visit Denver keeps a full October calendar if you want more options, but only one of these gives your costume a stage — so if you’re only planning one thing, plan that one.

What to lock in first

• Your costume — the contest rewards commitment over budget, so decide early and go all in. 2026 is a villain year: expect Doctor Doom and Vecna everywhere, with Frankenstein and the Bride as the couples look.
• Tickets — Coloween tickets drop in August 2026, and the email list buys first.
• A ride home — it’s a 21+ party and you’re not driving. Sort the ride before the night, not during it.
• Your group — a party is better with a crew, and Super Hosts who bring 10 people get in free.