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Free Events and Things to do in Boulder, CO

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Trek 50th anniversary celebration | Boulder
Sat, Jun 20, 9:00 AM
Boulder · Trek Bicycle Boulder
Trek 50th anniversary celebration | Boulder
Sat, Jun 20, 9:00 AM
Boulder · Trek Bicycle Boulder
Going fast
Spartan Demo Day | Denver Area Campus
Tomorrow at 10:00 AM
Broomfield · Spartan College of Aeronautics and Technology Denver Area Campus
Going fast
Spartan Demo Day | Denver Area Campus
Tomorrow at 10:00 AM
Broomfield · Spartan College of Aeronautics and Technology Denver Area Campus
Denver RUG - June 17th, 2026
Wed, Jun 17, 4:00 PM
Broomfield · 390 Interlocken Crescent #100
Denver RUG - June 17th, 2026
Wed, Jun 17, 4:00 PM
Broomfield · 390 Interlocken Crescent #100
Cleaning Up Mt. Everest: A Reflection on High-Altitude Stewardship
Fri, Jun 12, 7:00 PM
Boulder · Neptune Mountaineering
Cleaning Up Mt. Everest: A Reflection on High-Altitude Stewardship
Fri, Jun 12, 7:00 PM
Boulder · Neptune Mountaineering
Sales end soon
FREE GRAND REOPENING Yoga with Alex at prAna Boulder
Tomorrow at 10:00 AM
Boulder · prAna Boulder
Sales end soon
FREE GRAND REOPENING Yoga with Alex at prAna Boulder
Tomorrow at 10:00 AM
Boulder · prAna Boulder
June 10th Broomfield Bonfire
Wednesday at 6:00 PM
Broomfield · The Chateaux At Fox Meadows
June 10th Broomfield Bonfire
Wednesday at 6:00 PM
Broomfield · The Chateaux At Fox Meadows
Sales end soon
Gold Hill Group Ride with Ned Gravel & TrainingPeaks!
Sunday at 9:00 AM
Boulder · Skratch Labs Table and Flagship Store
Sales end soon
Gold Hill Group Ride with Ned Gravel & TrainingPeaks!
Sunday at 9:00 AM
Boulder · Skratch Labs Table and Flagship Store
Almost full
Queer Romance Book Club
Wednesday at 6:00 PM
Boulder · 1909 9th St
Almost full
Queer Romance Book Club
Wednesday at 6:00 PM
Boulder · 1909 9th St
Ancestry Pt. 1 – Census
Sat, Jun 13, 2:00 PM
Louisville · Louisville Public Library
Ancestry Pt. 1 – Census
Sat, Jun 13, 2:00 PM
Louisville · Louisville Public Library
Sales end soon
Birth Workers of Boulder Coffee Meet-Up: June!
Monday at 11:00 AM
Louisville · Relish Food Hall // Pickleball
Sales end soon
Birth Workers of Boulder Coffee Meet-Up: June!
Monday at 11:00 AM
Louisville · Relish Food Hall // Pickleball
Almost full
The Wellness Home Experience-Clean Choices for healthier Living
Thu, Jun 11, 12:00 PM
Boulder · Confluence Kitchen & Bath
Almost full
The Wellness Home Experience-Clean Choices for healthier Living
Thu, Jun 11, 12:00 PM
Boulder · Confluence Kitchen & Bath
Lija Fisher -- "The Extraordinary Adventures of the Ordinary Barney Flarff"
Wed, Jun 24, 6:30 PM
Boulder · Boulder Bookstore
Lija Fisher -- "The Extraordinary Adventures of the Ordinary Barney Flarff"
Wed, Jun 24, 6:30 PM
Boulder · Boulder Bookstore
Preparing our National Parks for the impacts of extreme weather events
Wed, Jun 24, 7:30 PM
Boulder · Frasier Retirement Community
Preparing our National Parks for the impacts of extreme weather events
Wed, Jun 24, 7:30 PM
Boulder · Frasier Retirement Community
Almost full
Renegade Motherhood Mixer for Moms in Business - Lafayette
Tuesday at 9:00 AM
Lafayette · Confluence Small Business Collective
Almost full
Renegade Motherhood Mixer for Moms in Business - Lafayette
Tuesday at 9:00 AM
Lafayette · Confluence Small Business Collective
Latte Art Throwdown at O.W.L Coffee Roasters
Fri, Jun 19, 6:00 PM
Boulder · 2355 30th St
Latte Art Throwdown at O.W.L Coffee Roasters
Fri, Jun 19, 6:00 PM
Boulder · 2355 30th St
Plant Forward Boulder Potluck: Dine with a Dietician
Sun, Jun 21, 3:00 PM
Boulder · NoBo Library - Boulder Public Library District
Plant Forward Boulder Potluck: Dine with a Dietician
Sun, Jun 21, 3:00 PM
Boulder · NoBo Library - Boulder Public Library District
Almost full
Pulling for Louisville-Aquarius
Thu, Jun 18, 5:00 PM
Louisville · Aquarius Trailhead, Louisville
Almost full
Pulling for Louisville-Aquarius
Thu, Jun 18, 5:00 PM
Louisville · Aquarius Trailhead, Louisville
Almost full
Boulder County Private Well Owner Workshop- Nederland 2026
Wed, Jun 17, 6:00 PM
Nederland · Nederland Community Center
Almost full
Boulder County Private Well Owner Workshop- Nederland 2026
Wed, Jun 17, 6:00 PM
Nederland · Nederland Community Center
Women In Business-BOULDER-Networking-June
Tue, Jun 16, 12:00 PM
Boulder · Confluence Kitchen & Bath
Women In Business-BOULDER-Networking-June
Tue, Jun 16, 12:00 PM
Boulder · Confluence Kitchen & Bath
La Sportiva Green Mountain Challenge: Prize Giving Party
Boulder · La Sportiva Retail Store
La Sportiva Green Mountain Challenge: Prize Giving Party
Boulder · La Sportiva Retail Store

Trends in Boulder

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Frequently asked questions about Boulder

What are the best free events to attend?

According to Eventbrite, the best free events are:

Trek 50th anniversary celebration | Boulder

Denver RUG - June 17th, 2026

Cleaning Up Mt. Everest: A Reflection on High-Altitude Stewardship

June 10th Broomfield Bonfire

Which events are currently trending in Boulder?

The trending searches this month in Boulder are:

memorial day weekend events

stand up comedy

Which free events are coming up?

Discover the best free events happening soon – you don't want to miss them:

Spartan Demo Day | Denver Area Campus

FREE GRAND REOPENING Yoga with Alex at prAna Boulder

Gold Hill Group Ride with Ned Gravel & TrainingPeaks!

Birth Workers of Boulder Coffee Meet-Up: June!