find Halloween events for every vibe.

Dog event events in O'fallon, MO

Just added!
TBGC Speed “Friending” Social
Sat, Nov 1, 2:30 PM
South Hampton · 4401 Hampton Ave
Just added!
TBGC Speed “Friending” Social
Sat, Nov 1, 2:30 PM
South Hampton · 4401 Hampton Ave
Trunk-or-Treat Benefitting The National Children's Cancer Society (NCCS)
Sun, Oct 19, 2:00 PM
Gartside · 5500 N Belt W
Trunk-or-Treat Benefitting The National Children's Cancer Society (NCCS)
Sun, Oct 19, 2:00 PM
Gartside · 5500 N Belt W
BOO'D UP ST. LOUIS| THE ULTIMATE R&B DAY PARTY (HALLOWEEN EDITION)
Sun, Oct 26, 2:00 PM
Columbus Square · The House Of Soul
BOO'D UP ST. LOUIS| THE ULTIMATE R&B DAY PARTY (HALLOWEEN EDITION)
Sun, Oct 26, 2:00 PM
Columbus Square · The House Of Soul
IDOT Roundtable & Networking Event- District 8
Tue, Oct 28, 5:00 PM
Meadow Heights · District 8 Headquarters
IDOT Roundtable & Networking Event- District 8
Tue, Oct 28, 5:00 PM
Meadow Heights · District 8 Headquarters
MWC Presents Tricks, Treats, and Titles
Sat, Oct 18, 7:00 PM
Illinois · Tri-County Rod and Gun Club
MWC Presents Tricks, Treats, and Titles
Sat, Oct 18, 7:00 PM
Illinois · Tri-County Rod and Gun Club
Just added!
Brunch Behavior: Tyler Lepley
Sun, Nov 9, 3:00 PM
Downtown West · The Marquee Restaurant & Lounge
Just added!
Brunch Behavior: Tyler Lepley
Sun, Nov 9, 3:00 PM
Downtown West · The Marquee Restaurant & Lounge
Uptown Collinsville Fall Festival
Sat, Oct 25, 10:00 AM
Collinsville · Uptown Collinsville
Uptown Collinsville Fall Festival
Sat, Oct 25, 10:00 AM
Collinsville · Uptown Collinsville
2026 STL TechWeek
Mon, Apr 13, 9:00 AM
Columbus Square · America's Center Convention Complex
2026 STL TechWeek
Mon, Apr 13, 9:00 AM
Columbus Square · America's Center Convention Complex
Sales end soon
Faith Through Fire Survivor Swag Bag Meet Up
Saturday at 1:00 PM
Richmond Heights · St. Louis Galleria 1155 Galleria, St. Louis, MO 63117
Sales end soon
Faith Through Fire Survivor Swag Bag Meet Up
Saturday at 1:00 PM
Richmond Heights · St. Louis Galleria 1155 Galleria, St. Louis, MO 63117
Sales end soon
Trunk or Treat
Saturday at 4:00 PM
O'Fallon · 123 Hutchings Farm Dr
Sales end soon
Trunk or Treat
Saturday at 4:00 PM
O'Fallon · 123 Hutchings Farm Dr
St. Louis Pride Bar Crawl
Sat, Jun 20, 4:00 PM
Peabody · Great Grizzly Bear
St. Louis Pride Bar Crawl
Sat, Jun 20, 4:00 PM
Peabody · Great Grizzly Bear
45th Annual Hermann Wurstfest
Fri, Mar 27, 5:00 PM
Hermann · Hermann
45th Annual Hermann Wurstfest
Fri, Mar 27, 5:00 PM
Hermann · Hermann
Just added!
Karen Berger Halloween Party at The Hill Cigar Co
Thu, Oct 30, 4:00 PM
The Hill · The Hill Cigar Co, Southwest Avenue, St. Louis, MO, USA
Just added!
Karen Berger Halloween Party at The Hill Cigar Co
Thu, Oct 30, 4:00 PM
The Hill · The Hill Cigar Co, Southwest Avenue, St. Louis, MO, USA
Just added!
Home Run Happy Hour: Launch of Granum
Thu, Nov 6, 6:00 PM
Downtown · Cardinals Nation Hall Of Fame Club
Just added!
Home Run Happy Hour: Launch of Granum
Thu, Nov 6, 6:00 PM
Downtown · Cardinals Nation Hall Of Fame Club
Just added!
The City Foundry Halloween Party
Wed, Oct 29, 5:30 PM
Midtown · City Foundry STL
Just added!
The City Foundry Halloween Party
Wed, Oct 29, 5:30 PM
Midtown · City Foundry STL
Seeing You Women's Conference
Sat, Nov 1, 11:00 AM
University City · 8310 Olive Blvd
Seeing You Women's Conference
Sat, Nov 1, 11:00 AM
University City · 8310 Olive Blvd
Nine and Wine Ladies Events: June 23/Driver
Mon, Jun 23, 6:30 PM
Fenton · Gimme Golf Club - South Clubhouse
Nine and Wine Ladies Events: June 23/Driver
Mon, Jun 23, 6:30 PM
Fenton · Gimme Golf Club - South Clubhouse
Just added!
Trick or Treating at City Foundry
Wed, Oct 22, 5:30 PM
Midtown · City Foundry STL
Just added!
Trick or Treating at City Foundry
Wed, Oct 22, 5:30 PM
Midtown · City Foundry STL
Cambridge House of Maryville's Annual Trunk or Treat
Thu, Oct 23, 5:00 PM
Chinatown · 6960 IL-162
Cambridge House of Maryville's Annual Trunk or Treat
Thu, Oct 23, 5:00 PM
Chinatown · 6960 IL-162
Sales end soon
Meet Me In St. Louis Trolley Tour October 11, 2025
Saturday at 12:00 PM + 1 more
Kings Oak · Prism
Sales end soon
Meet Me In St. Louis Trolley Tour October 11, 2025
Saturday at 12:00 PM + 1 more
Kings Oak · Prism

Trends in O'fallon

Explore more trends

TBGC Speed “Friending” Social

TBGC Speed “Friending” Social

Trunk-or-Treat Benefitting The National Children's Cancer Society (NCCS)

Trunk-or-Treat Benefitting The National Children's Cancer Society (NCCS)

BOO'D UP ST. LOUIS| THE ULTIMATE R&B DAY PARTY (HALLOWEEN EDITION)

BOO'D UP ST. LOUIS| THE ULTIMATE R&B DAY PARTY (HALLOWEEN EDITION)

IDOT Roundtable & Networking Event- District 8

IDOT Roundtable & Networking Event- District 8

MWC Presents Tricks, Treats, and Titles

MWC Presents Tricks, Treats, and Titles

Brunch Behavior: Tyler Lepley

Brunch Behavior: Tyler Lepley

Uptown Collinsville Fall Festival

Uptown Collinsville Fall Festival

2026 STL TechWeek

2026 STL TechWeek

Faith Through Fire Survivor Swag Bag Meet Up

Faith Through Fire Survivor Swag Bag Meet Up

Trunk or Treat

Trunk or Treat

St. Louis Pride Bar Crawl

St. Louis Pride Bar Crawl

45th Annual Hermann Wurstfest

45th Annual Hermann Wurstfest

Karen Berger Halloween Party at The Hill Cigar Co

Karen Berger Halloween Party at The Hill Cigar Co

Home Run Happy Hour: Launch of Granum

Home Run Happy Hour: Launch of Granum

The City Foundry Halloween Party

The City Foundry Halloween Party

Seeing You Women's Conference

Seeing You Women's Conference

Nine and Wine Ladies Events: June 23/Driver

Nine and Wine Ladies Events: June 23/Driver

Trick or Treating at City Foundry

Trick or Treating at City Foundry

Cambridge House of Maryville's Annual Trunk or Treat

Cambridge House of Maryville's Annual Trunk or Treat

Meet Me In St. Louis Trolley Tour October 11, 2025

Meet Me In St. Louis Trolley Tour October 11, 2025

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. Puppy yoga

9. Puff and paint

10. Kids

11. Halloween party

12. Autumn