Free Events and Things to do in Boulder, CO

Search for something you love or check out popular events in your area.

Almost full
CU Boulder Sustainability Research Summit
Tomorrow at 9:00 AM
Main Campus · University Memorial Center (UMC)
Almost full
CU Boulder Sustainability Research Summit
Tomorrow at 9:00 AM
Main Campus · University Memorial Center (UMC)
Selling fast
Boulder County Trunk or Treat
Tue, Oct 20, 4:00 PM
East Boulder · Boulder County Sheriff's Office
Selling fast
Boulder County Trunk or Treat
Tue, Oct 20, 4:00 PM
East Boulder · Boulder County Sheriff's Office
Almost full
CU Sustainability Research Summit Keynote Speaker - Cassandra Brooks
Tomorrow at 4:00 PM
Main Campus · Fiske Planetarium
Almost full
CU Sustainability Research Summit Keynote Speaker - Cassandra Brooks
Tomorrow at 4:00 PM
Main Campus · Fiske Planetarium
Selling fast
Boulder Career Fair
Tue, Dec 8, 9:30 AM
Gold Run · Marriott
Selling fast
Boulder Career Fair
Tue, Dec 8, 9:30 AM
Gold Run · Marriott
Sales end soon
The Longest Table - Boulder, CO
Saturday at 12:00 PM
Mapleton Hill · Highland Avenue
Sales end soon
The Longest Table - Boulder, CO
Saturday at 12:00 PM
Mapleton Hill · Highland Avenue
Summit Pilates x Limelight Boulder Mat Series
Sunday at 9:00 AM
Grandview · Limelight Boulder
Summit Pilates x Limelight Boulder Mat Series
Sunday at 9:00 AM
Grandview · Limelight Boulder
2026 IHC Neuro-Inclusive Housing Workshop
Mon, Oct 26, 10:00 AM
Irvington · Willoughby Corner
2026 IHC Neuro-Inclusive Housing Workshop
Mon, Oct 26, 10:00 AM
Irvington · Willoughby Corner
Sales end soon
The sparkling solar wind: Insight from the PUNCH Mission
Today at 7:00 PM
Devil's Thumb · NSF NCAR Mesa Laboratory
Sales end soon
The sparkling solar wind: Insight from the PUNCH Mission
Today at 7:00 PM
Devil's Thumb · NSF NCAR Mesa Laboratory
Boulder County Water Development Seminar: Past, Present, and Future
Sat, Oct 31, 8:00 AM
East Foothills · Unitarian Universalist Church of Boulder
Boulder County Water Development Seminar: Past, Present, and Future
Sat, Oct 31, 8:00 AM
East Foothills · Unitarian Universalist Church of Boulder
Sales end soon
FREE Roots, Connections & Networking Mixer Event
Saturday at 10:00 AM
Colorado · Pactolus Lake Road
Sales end soon
FREE Roots, Connections & Networking Mixer Event
Saturday at 10:00 AM
Colorado · Pactolus Lake Road
Almost full
Crime Free Housing Training / Tuesday, Oct 20, 2026
Tue, Oct 20, 9:00 AM
Marnett · 350 Kimbark St
Almost full
Crime Free Housing Training / Tuesday, Oct 20, 2026
Tue, Oct 20, 9:00 AM
Marnett · 350 Kimbark St
Selling fast
BioFrontiers Presents: Stephanie Bryant
Tue, Oct 20, 6:00 PM
East Campus · Jennie Smoly Caruthers Biotechnology Building, Room A115 (Butcher Auditorium)
Selling fast
BioFrontiers Presents: Stephanie Bryant
Tue, Oct 20, 6:00 PM
East Campus · Jennie Smoly Caruthers Biotechnology Building, Room A115 (Butcher Auditorium)
BioFrontiers Presents: Saad Bhamla
Tue, Nov 17, 6:00 PM
East Campus · Jennie Smoly Caruthers Biotechnology Building, Room A115 (Butcher Auditorium)
BioFrontiers Presents: Saad Bhamla
Tue, Nov 17, 6:00 PM
East Campus · Jennie Smoly Caruthers Biotechnology Building, Room A115 (Butcher Auditorium)
Sales end soon
Summit Pilates x Moxy Boulder Mat Series
Saturday at 9:00 AM
Grandview · Moxy Boulder
Sales end soon
Summit Pilates x Moxy Boulder Mat Series
Saturday at 9:00 AM
Grandview · Moxy Boulder
One Room. Two Ways.
Sat, Oct 17, 10:00 AM
Becker · 10038 Wadsworth Pkwy
One Room. Two Ways.
Sat, Oct 17, 10:00 AM
Becker · 10038 Wadsworth Pkwy
Choice House Halloween Party!
Thu, Oct 22, 6:00 PM
Gunbarrel · 6901 Lookout Rd, Boulder, CO, USA
Choice House Halloween Party!
Thu, Oct 22, 6:00 PM
Gunbarrel · 6901 Lookout Rd, Boulder, CO, USA
Selling fast
An Evening with Barry Blanchard
Saturday at 6:30 PM
Majestic Heights · Neptune Mountaineering
Selling fast
An Evening with Barry Blanchard
Saturday at 6:30 PM
Majestic Heights · Neptune Mountaineering
AERO Day | McAir Aviation, Broomfield Campus
Sat, Oct 17, 10:00 AM
Interlocken · McAir Aviation - Broomfield
AERO Day | McAir Aviation, Broomfield Campus
Sat, Oct 17, 10:00 AM
Interlocken · McAir Aviation - Broomfield
Sales end soon
Boulder Day Nursery School Tour
Saturday at 10:00 AM + 10 more
Downtown · 1518 Spruce St
Sales end soon
Boulder Day Nursery School Tour
Saturday at 10:00 AM + 10 more
Downtown · 1518 Spruce St
Where quantum innovators come to break through
Today at 2:00 PM
Main Campus · Duane Physics and Astrophysics (F1117)
Where quantum innovators come to break through
Today at 2:00 PM
Main Campus · Duane Physics and Astrophysics (F1117)

Trends in Boulder

Explore more trends

Frequently asked questions about Boulder

What are the best free events to attend?

According to Eventbrite, the best free events are:

Boulder County Trunk or Treat

Boulder Career Fair

The Longest Table - Boulder, CO

Summit Pilates x Limelight Boulder Mat Series

Which events are currently trending in Boulder?

The trending searches this month in Boulder are:

memorial day weekend events

mother's day

live music

stand up comedy

Which free events are coming up?

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

Where quantum innovators come to break through

The sparkling solar wind: Insight from the PUNCH Mission

CU Boulder Sustainability Research Summit

CU Sustainability Research Summit Keynote Speaker - Cassandra Brooks

CU Boulder Sustainability Research Summit

CU Boulder Sustainability Research Summit

Boulder County Trunk or Treat

Boulder County Trunk or Treat

CU Sustainability Research Summit Keynote Speaker - Cassandra Brooks

CU Sustainability Research Summit Keynote Speaker - Cassandra Brooks

Boulder Career Fair

Boulder Career Fair

The Longest Table - Boulder, CO

The Longest Table - Boulder, CO

Summit Pilates x Limelight Boulder Mat Series

Summit Pilates x Limelight Boulder Mat Series

2026 IHC Neuro-Inclusive Housing Workshop

2026 IHC Neuro-Inclusive Housing Workshop

The sparkling solar wind: Insight from the PUNCH Mission

The sparkling solar wind: Insight from the PUNCH Mission

Boulder County Water Development Seminar: Past, Present, and Future

Boulder County Water Development Seminar: Past, Present, and Future

FREE Roots, Connections & Networking Mixer Event

FREE Roots, Connections & Networking Mixer Event

Crime Free Housing Training / Tuesday, Oct 20, 2026

Crime Free Housing Training / Tuesday, Oct 20, 2026

BioFrontiers Presents: Stephanie Bryant

BioFrontiers Presents: Stephanie Bryant

BioFrontiers Presents: Saad Bhamla

BioFrontiers Presents: Saad Bhamla

Summit Pilates x Moxy Boulder Mat Series

Summit Pilates x Moxy Boulder Mat Series

One Room. Two Ways.

One Room. Two Ways.

Choice House Halloween Party!

Choice House Halloween Party!

An Evening with Barry Blanchard

An Evening with Barry Blanchard

AERO Day | McAir Aviation, Broomfield Campus

AERO Day | McAir Aviation, Broomfield Campus

Boulder Day Nursery School Tour

Boulder Day Nursery School Tour

Where quantum innovators come to break through

Where quantum innovators come to break through

Things to do around Boulder

Trends in Boulder

1. Memorial day weekend events

2. Mother's day

3. Live music

4. Stand up comedy

5. Speed dating events

6. Sound bath

7. Singles party

8. Free yoga

9. Drag

10. Job fairs

11. Electronic music

12. Breathwork

What are the best free events to attend?

Which events are currently trending in Boulder?

Which free events are coming up?