
Monster Day Greeley | August 23, 2025
Noon-5pm | Downtown Greeley, CO
Countdown to Monster Day 2025
Day(s)
:
Hour(s)
:
Minute(s)
:
Second(s)
The Mission of Monster Day is to celebrate monsters in our culture in a positive way that encourages imagination and creativity.
Mark your calendar for August 23, 2025, when Monster Day takes over Downtown Greeley again!. There will be costumed monsters roaming the plazas, professional makeup demonstrations, vendor booths, food and beverages, monster makeup, face painting, music, kids activities, a costume contest and more! Plus, Distortions Unlimited will have dozens of their creations set up around the plaza ready for your epic monster photo ops.
More information on the 2025 event is coming soon! (Get updates and RSVP to the Facebook event here.)
Monster Day Greeley - Aug. 17, 2024
Noon-6p.m. in Downtown GreeleyWhat is Monster Day?
It’s a family-friendly celebration of all things “monster!” With the debut of Greeley Gremlin, music, entertainment, face painting, costume contests, demonstrations, and more!
Don't Be a Monster
Proceeds from Monster Day will benefit Don’t Be A Monster, a 501(c)(3) nonprofit organization that offers unique and entertaining anti-bullying assemblies in schools for students in 4th-10th grade.
Follow the fun on Facebook
RSVP to the Monster Day 2024 Facebook event, and follow the monster fun on our Monster Day Facebook page.

Monster Day Weekend Kicks Off with a Rockin’ Friday Fest Concert
Greeley is about to get loud, spooky, and spectacular. Monster Day Greeley 2025 isn’t just taking over Saturday — we’re kicking things off early with a Friday night party you won’t want to miss. You might get to see a few monsters creeping around. Join us on Friday,...

What You Need to Know About Monster Day’s New Costume & Prop Policy
At Monster Day Greeley, we live for outrageous costumes, over-the-top props, and unforgettable monster moments. But as our beloved event grows, so does our commitment to keeping it safe, inclusive, and fun for everyone. That’s why we’re unveiling our updated Costume...

Calling All Creepers & Creatures: The Monster Day Costume Contest Is Leveling Up
Learn about the ins and outs of the 2025 Monster Day Greeley costume Contest and Monster Parade. there are a few changes you will want to know about, and even bigger prizes!

Costume Contest Photos | Monster Day Greeley 2024
Check out photos from the 2023 Monster Day Greeley costume contest!

Get Ready for Monster Day Greeley 2024!
Mark your calendars for August 17, 2024, as Greeley, Colorado, transforms into a monster lover's paradise! Monster Day Greeley is back with a full day of spine-tingling fun for all ages. This unique event celebrates all things monstrous with live entertainment,...

Costume Contest Photos | Monster Day Greeley 2023
Check out photos from the 2023 Monster Day Greeley costume contest!

Monster Moms: Celebrating Mother’s Day with Pop Culture’s Most Fearsome Matriarchs
Mother's Day is just around the corner, and what better way to celebrate than by highlighting some of pop culture's most memorable monster moms? From classic horror films to modern-day TV shows, these fierce females have made their mark on the entertainment world. So,...

Costume Contest Photos | Monster Day Greeley 2022
Step into a realm where monsters roam free and imaginations run wild - Monster Day Greeley, and this year's costume contest was an absolute scream! As the warm winds blew through the town of Greeley, we were spellbound by the jaw-dropping creativity and craftsmanship...

Meet ‘The Mutant’ At Monster Day Greeley 2022
Photo ops are one of the best part about Monster Day. Aside from the roaming costumed actors, and the hundreds of dressed up attendees, Distortions Unlimited puts out dozens of their amazing, monstrous creations around the 8th and 9th Street plaza for monster lovers...

Weldwerks Brewing Creates Greeley Gremlin: Rex’s Revenge Beer For Monster Day 2022
In conjunction with our annual Monster Day Celebration, our neighbors down the street at WeldWerks Brewing Company have concocted a delicious addition (for those over 21) to the Monster Day Festivities. A cherry and vanilla sour ale called "Greeley Gremlin: Rex's...