Things to Do in Denver in October

October is the best month to be in Denver. The heat breaks, the aspens turn, and the whole city leans into fall and Halloween at the same time. Corn mazes, haunted houses, pumpkin nights, craft beer, and a stacked lineup of Denver October events — you could fill every weekend and still miss stuff. Here are the things to do in Denver in October worth building a plan around, ending with the party we throw on the 31st.

What Is the Weather in Denver in October?

October in Denver is warm days, cold nights. Afternoons are mild and sunny; after sunset it drops fast, and the tail end of the month can flirt with a freeze. Rain is rare. Bring a light jacket for daytime and a real layer for anything outdoors after dark. Here is what an average October day looks like:

Get Lost in the Chatfield Farms Corn Maze

Denver Botanic Gardens runs a massive corn maze at Chatfield Farms every fall — seven-plus acres of stalks with a new design each year. There is a family-friendly daytime version and a scarier after-dark run once the lanterns come on. Elevated bridges let you scout the layout before you commit. Good food, good drinks, and a genuine chance of getting turned around.

Wild Fall at the Denver Zoo

The zoo goes full autumn in October with pumpkin displays, costumed characters, animal encounters, and carving demos. It is the family pick on this list — face painting, pumpkin decorating, and a low-key way to spend a crisp afternoon. Kids in costume, animals doing their thing, no jump scares required.

Glow at the Botanic Gardens

The Denver Botanic Gardens light up with hundreds of hand-carved, glowing jack-o’-lanterns after dark. Walk the paths under thousands of flickering pumpkins, catch live performances of Halloween classics, and grab food and drinks along the way. It is one of the prettiest fall nights the city offers, and it sells timed tickets, so book ahead.

Tour Denver’s Haunted Attractions

October is peak season for Denver ghost stories. Take a guided walking tour of Capitol Hill and hear the history behind the city’s most haunted blocks. Or visit the Molly Brown House Museum — the 1889 home of the Titanic survivor, and one of the more famously haunted addresses in Colorado. Real history, real chills, no actors in masks.

Haunted Houses in Denver: 13th Floor and Frightmare

If a walking tour is too tame, October is when the big haunts run nightly. 13th Floor Haunted House is the national name — big sets, committed actors, lines that build fast. The Frightmare Compound in Westminster is the old-school haunt locals swear by. Book timed tickets before the last two weekends of the month; walk-up is a gamble.

Catch a Show at Red Rocks

Red Rocks Amphitheatre keeps its concert calendar going into October, and a show under the stars with the fall air rolling in off the foothills is hard to beat. The acoustics are legendary for a reason. Come early, hike the trails around the rocks, then settle in for the set. Dress warm — the temperature drops the second the sun does.

Drink at the Great American Beer Festival

The Great American Beer Festival takes over the Colorado Convention Center each fall — thousands of brewers pouring the best beer in the country under one roof. Tastings, brewery tours, education sessions, and the most prestigious brewing competition in America. If you are a craft beer person, this is the reason to be in Denver in October.

Join the Denver Zombie Crawl

One of the largest zombie pub crawls in the country stumbles through Lower Downtown (LoDo) every October. Show up in full undead makeup, grab your survival kit, and hit the participating bars for drink specials. It is free, it is chaos, and you are not watching from the sidelines — you are part of a mob of thousands of costumed partiers taking over the streets.

Watch the Broadway Halloween Parade

The Broadway Halloween Parade rolls down Denver’s Broadway corridor with spooky floats, marching bands, and costumed crowds on both sides of the street. It is family-friendly, free to watch, and the surrounding restaurants and boutiques run their own pre- and post-parade events. Get there early for a spot on the route.

Free Things to Do in Denver in October: LoDo, RiNo, Cherry Creek

If you would rather wander than get spooked, Denver’s neighborhoods deliver in October. LoDo mixes historic buildings like Union Station and Larimer Square with modern restaurants. RiNo is wall-to-wall street art and galleries. Cherry Creek North decks itself out with pumpkins, giant spiders, and food trucks slinging candy apples and hot cocoa. Easy, festive, no ticket required — and Visit Denver keeps a running events calendar if you want to go deeper.

End the Month at Coloween — Denver’s Biggest Halloween Party

When the family stuff and the daytime festivals are done, October in Denver builds to one night. Coloween is Denver’s biggest Halloween party, and 2026 is our 19th year. Saturday, October 31 — Halloween night itself — at Bounce Empire in Lafayette — the world’s largest indoor inflatable park, 25 minutes from downtown Denver. The biggest 21+ Halloween party in the state, with immersive rooms that make you forget what city you are in. It is the payoff for a whole month of fall. The calendar helps this year, too: the 31st lands on a Saturday, so the month builds to a true Saturday-night finale.

The costume is the point. Coloween runs a cash-prize costume contest, so this is where all that October inspiration cashes out. Go big or go home — the winners are the people who commit. Early read on 2026: villains are up (Doctor Doom leads), and Wednesday-style gothic looks are not slowing down. Tickets drop in August 2026 and the email list buys first, so get on it before the early rounds are gone.