letsrace

I Ain't Scared (of 5k)

RunCO

I Ain't Scared (of 5k)

October 31, 2026 • Thornton, CO

Course Distances

5K

About this race

Dress up and run spooky and silly at the I Ain't Scared (of 5k) in Thornton! Fun music, Halloween snacks and costumes galore!! This event only comes around once every few years when Halloween lands on a weekend. You don't want to miss it! Every racer gets a T-shirt with GLOW IN THE DARK printing and a FINISHER MEDAL!

Register now at RunSignup

Official Registration

Real-time pricing via RunSignup

Syncing with RunSignup...

Secure checkout opens in a new tab

Recommended Halloween Races

Similar events in Colorado

Run

Oct 3

Spooky Sprint - Denver

Littleton, CO

Run

Oct 24

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, CO

Run

Oct 25

Ghosts and Goblins 5K/10K

Denver, CO

Boos & Brews Halloween 5k @ Number 38

Run

Oct 31

Boos & Brews Halloween 5k @ Number 38

Denver, CO

Run

Oct 31

Foundry Halloween 5k

Steamboat Springs, CO

All-Out Kooky-Spooky

Run

Nov 1

All-Out Kooky-Spooky

Golden, CO

Around Thornton

Don't miss these other races in the area

Run

Jun 20

Unicorn 5k (North)

Thornton, CO

Run

Sep 13

RMRR September Trophy Series

Thornton, CO