find Halloween events for every vibe.

Open mic events in O'fallon, MO

STL Insight Breakfast: 2026 Cybersecurity Threat Outlook
Wed, Oct 22, 9:00 AM
Clayton · Husch Blackwell
STL Insight Breakfast: 2026 Cybersecurity Threat Outlook
Wed, Oct 22, 9:00 AM
Clayton · Husch Blackwell
Sales end soon
"Mass Confusion" Tour of the Catholic Faith
Tomorrow at 7:30 PM
Acme Heights · 1508 Bopp Rd
Sales end soon
"Mass Confusion" Tour of the Catholic Faith
Tomorrow at 7:30 PM
Acme Heights · 1508 Bopp Rd
Just added!
Perfect Storm Workshop- Unpacking Pediatric Neurologic Conditions
Wed, Nov 5, 6:00 PM
Frenchtown · 1365 Triad Center Dr
Just added!
Perfect Storm Workshop- Unpacking Pediatric Neurologic Conditions
Wed, Nov 5, 6:00 PM
Frenchtown · 1365 Triad Center Dr
St. Louis Halloween Bar Crawl 2025 | Saturday, November 1st
Sat, Nov 1, 7:30 PM
Kings Oak · Platypus
St. Louis Halloween Bar Crawl 2025 | Saturday, November 1st
Sat, Nov 1, 7:30 PM
Kings Oak · Platypus
Prolonged Exposure: Helping Clients Recover from PTSD
Fri, Nov 14, 9:00 AM
Peabody · Illume: The Behavioral Health Center of Excellence
Prolonged Exposure: Helping Clients Recover from PTSD
Fri, Nov 14, 9:00 AM
Peabody · Illume: The Behavioral Health Center of Excellence
Sales end soon
Startup Event Pitch Secrets: Get Investors Hooked at Events - Maryland Heights
Today at 7:00 PM + 88 more
Ascalon · Virtual (Online)
Sales end soon
Startup Event Pitch Secrets: Get Investors Hooked at Events - Maryland Heights
Today at 7:00 PM + 88 more
Ascalon · Virtual (Online)
LBB Leisure Book Club Presents: A Live Discussion with Andrea Dunlop
Tue, Nov 18, 6:00 PM
St. Peters · Gateway to Dreams
LBB Leisure Book Club Presents: A Live Discussion with Andrea Dunlop
Tue, Nov 18, 6:00 PM
St. Peters · Gateway to Dreams
Trunk or Treat at Rooftop Church
Sun, Oct 26, 5:00 PM
Affton · Rooftop Church
Trunk or Treat at Rooftop Church
Sun, Oct 26, 5:00 PM
Affton · Rooftop Church
ServSafe Food Manager Course & Proctored Exam
Mon, Nov 3, 10:00 AM
Beck · Weber's Front Row
ServSafe Food Manager Course & Proctored Exam
Mon, Nov 3, 10:00 AM
Beck · Weber's Front Row
St. Louis| Permanent Makeup Certification |PMU Brows|Lips|Eyeliner
Fri, Jan 2, 10:00 AM + 5 more
Bellemont · Regus - St Louis - CityPlace
St. Louis| Permanent Makeup Certification |PMU Brows|Lips|Eyeliner
Fri, Jan 2, 10:00 AM + 5 more
Bellemont · Regus - St Louis - CityPlace
St. Louis|ScalpMicropigmentation(SMP)|Hands On Class|School of Glamology
Fri, Jan 2, 10:00 AM + 5 more
Bellemont · Regus - St Louis - CityPlace
St. Louis|ScalpMicropigmentation(SMP)|Hands On Class|School of Glamology
Fri, Jan 2, 10:00 AM + 5 more
Bellemont · Regus - St Louis - CityPlace
LED ZEPPELIN MEETS THE BEATLES LIVE AT THE RICKMAN AUDITORIUM (Arnold, MO)
Sat, Dec 6, 7:00 PM
Maxville · Rickman Auditorium
LED ZEPPELIN MEETS THE BEATLES LIVE AT THE RICKMAN AUDITORIUM (Arnold, MO)
Sat, Dec 6, 7:00 PM
Maxville · Rickman Auditorium
Selling quickly
Sarah Adams | In Your Dreams
Tue, Jan 13, 7:00 PM
Covenant Blu · The Sun Theatre
Selling quickly
Sarah Adams | In Your Dreams
Tue, Jan 13, 7:00 PM
Covenant Blu · The Sun Theatre
Selling quickly
Tour de Museo
Today at 1:00 PM
Wydown Skinker · Mildred Lane Kemper Art Museum
Selling quickly
Tour de Museo
Today at 1:00 PM
Wydown Skinker · Mildred Lane Kemper Art Museum
Best In Business Speaker Series, Oct. 22, 2025
Wed, Oct 22, 7:30 AM
Richmond Heights · 1034 S Brentwood Blvd 17th f
Best In Business Speaker Series, Oct. 22, 2025
Wed, Oct 22, 7:30 AM
Richmond Heights · 1034 S Brentwood Blvd 17th f
ST louis, Everything Eyebrow Certification| 8 Methods | School of Gla
Fri, Jan 2, 10:00 AM + 6 more
Bellemont · Regus - St Louis - CityPlace
ST louis, Everything Eyebrow Certification| 8 Methods | School of Gla
Fri, Jan 2, 10:00 AM + 6 more
Bellemont · Regus - St Louis - CityPlace
Number 9 Networking - Clayton, MO - 9am
Fri, Oct 17, 9:00 AM + 9 more
Clayton · Bank of Washington
Number 9 Networking - Clayton, MO - 9am
Fri, Oct 17, 9:00 AM + 9 more
Clayton · Bank of Washington
The Spirituality of Depolarization (Free Event)
Thursday at 6:30 PM
University City · University City Public Library, Rm 207
The Spirituality of Depolarization (Free Event)
Thursday at 6:30 PM
University City · University City Public Library, Rm 207
Integrative Wellness Summit StL 2026
Sat, Mar 7, 8:00 AM
Downtown West · TBD - St. Louis
Integrative Wellness Summit StL 2026
Sat, Mar 7, 8:00 AM
Downtown West · TBD - St. Louis

Trends in O'fallon

Explore more trends

STL Insight Breakfast: 2026 Cybersecurity Threat Outlook

STL Insight Breakfast: 2026 Cybersecurity Threat Outlook

"Mass Confusion" Tour of the Catholic Faith

"Mass Confusion" Tour of the Catholic Faith

Perfect Storm Workshop- Unpacking Pediatric Neurologic Conditions

Perfect Storm Workshop- Unpacking Pediatric Neurologic Conditions

St. Louis Halloween Bar Crawl 2025 | Saturday, November 1st

St. Louis Halloween Bar Crawl 2025 | Saturday, November 1st

Prolonged Exposure: Helping Clients Recover from PTSD

Prolonged Exposure: Helping Clients Recover from PTSD

Startup Event Pitch Secrets: Get Investors Hooked at Events - Maryland Heights

Startup Event Pitch Secrets: Get Investors Hooked at Events - Maryland Heights

LBB Leisure Book Club Presents: A Live Discussion with Andrea Dunlop

LBB Leisure Book Club Presents: A Live Discussion with Andrea Dunlop

Trunk or Treat at Rooftop Church

Trunk or Treat at Rooftop Church

ServSafe Food Manager Course & Proctored Exam

ServSafe Food Manager Course & Proctored Exam

St. Louis| Permanent Makeup Certification |PMU Brows|Lips|Eyeliner

St. Louis| Permanent Makeup Certification |PMU Brows|Lips|Eyeliner

St. Louis|ScalpMicropigmentation(SMP)|Hands On Class|School of Glamology

St. Louis|ScalpMicropigmentation(SMP)|Hands On Class|School of Glamology

LED ZEPPELIN MEETS THE BEATLES LIVE AT THE RICKMAN AUDITORIUM (Arnold, MO)

LED ZEPPELIN MEETS THE BEATLES LIVE AT THE RICKMAN AUDITORIUM (Arnold, MO)

Sarah Adams | In Your Dreams

Sarah Adams | In Your Dreams

Tour de Museo

Tour de Museo

Best In Business Speaker Series, Oct. 22, 2025

Best In Business Speaker Series, Oct. 22, 2025

ST louis, Everything Eyebrow Certification| 8 Methods | School of Gla

ST louis, Everything Eyebrow Certification| 8 Methods | School of Gla

Number 9 Networking - Clayton, MO - 9am

Number 9 Networking - Clayton, MO - 9am

The Spirituality of Depolarization (Free Event)

The Spirituality of Depolarization (Free Event)

Integrative Wellness Summit StL 2026

Integrative Wellness Summit StL 2026

Things to do around O'fallon

Trends in O'fallon

1. Events happening today near me

2. Car shows

3. Trunk or treat

4. October

5. Crafts fair

6. Scramble golf tournaments

7. Job fairs

8. Halloween party

9. Kids

10. Puff and paint

11. Music bingo

12. Fireworks show