Monster Day Greeley Sticker

Monster Day Greeley | August 23, 2025

Noon-5pm | Downtown Greeley, CO

Countdown to Monster Day 2025

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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 Gay Greeley Ghostbusters
Ed Edmunds Painting Monster Gay Greeley
Monster Gay Greeley photo ops
Monster Gay Greeley Monsters
Monster Gay Greeley Ghostbusters

Monster Day Greeley - Aug. 17, 2024

Noon-6p.m. in Downtown Greeley
Greeley Gremlin

Monster Day on Instagram

Monster Day Greeley Mascots

What 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!

dont-be-a-monster-logo

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.

Monster Day 2018 Photos

Monster Day 2018 Photos

Thanks to everyone who came out and helped make Monster Day 2018 an amazing experience! Scary, creepy, cute, fuzzy, gross, fun...we saw all kinds of monsters, and we can't wait to see even more in 2019! Enjoy a few photos we snapped and some of what other...

Monster Day Greeley 2018 Costume Contest Photos

Monster Day Greeley 2018 Costume Contest Photos

Monster Day Greeley is happening THIS Saturday, August 18, 2018, from 4 p.m. to 9 p.m. in Downtown Greeley. There will be creatures everywhere and 40+ costumed actors roaming the area, but we also want to see your costume creations, so come dressed up and celebrate monsters with us. We’ll hold the costume contest around 6 p.m. on the main stage to let our first 40 entries show off their hard work and have a chance to win amazing prizes from Distortions Unlimited!

Happy National Monster Day!

Happy National Monster Day!

According to the Internet, August 14 is National Monster Day! Could the timing be any better, with Monster Day Greeley set to take place this weekend? We think not. So, celebrate your favorite monster(s) and mark your calendars to join us for a HUGE...

Monster Day Theme Song

Monster Day Theme Song

We think that Monster Day Greeley is the only local event with its own theme song and music video.  Check it out. Don't miss Monster Day on August 18 in Downtown Greeley!

Monster Day Greeley Photos [Gallery 2]

Monster Day Greeley Photos [Gallery 2]

Thanks to everyone who came out and make the first ever Monster Day such a success! I know we took more pictures than we know what to do with, and judging by how many camera flashes I saw going off all night, I think a lot of other people did the same thing. Here is...

Monster Day Greeley Photos [Gallery 1]

Monster Day Greeley Photos [Gallery 1]

Thanks to everyone who came out and make the first ever Monster Day such a success! I know we took more pictures than we know what to do with, and judging by how many camera flashes I saw going off all night, I think a lot of other people did the same thing. Here is our first batch of our photos for you to enjoy! (We’ll post more of them as we can go through and edit them.) Scary monster, fuzzy monsters, cute monsters, creepy monsters…there was a little bit of everything at Monster Day. What do you say…should we try and do it again next year?!

Monster Blog