5k in Thornton, Colorado | 2026-2027

Unicorn 5k (North) [runsignup.com]

Sat, Jun 20, 2026 at 8:00 AM

Description

Ready to get off the sofa and gallop around Thornton with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k in Thornton to kick off your summer! You'll earn a sweet tee shirt...

Ready to get off the sofa and gallop around Thornton with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k in Thornton to kick off your summer! You'll earn a sweet tee shirt and a flashy unicorn finisher medal!

It's a 5k distance for all, and whether you walk, trot, canter or gallop, we'll be happy to see you! This event also features a shorter saunter for those not quite ready to enjoy a full 5k! The untimed 3/4 mile run is long enough to get your heart rate up and be a 'real run' without being a sprint!

The Balloon Guy will be back this year- creating balloon creations for all!

Remember to refer your friends and you can earn back up to $20 back from your registration fee. Also - teams of 5 or more each get $5 off their registration. So form a group and get your buddies to join you today!

All the info you need about this event is found on this site - click the menu bar or scroll to the bottom to see a listing of all page links!

Denver Unicorn 5k - April

Highlands Ranch Unicorn 5k - August

1k 3.1 Miles 5k Run Walk

E 108th Ave & Colorado Blvd, Thornton, Colorado, 80233, United States
OpenStreetMap Google Maps

RMRR September Trophy Series [rmrr.org] [Register at runsignup.com]

Sun, Sep 13, 2026 at 8:00 AM

Description

Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us!

The 10km race uses a handicap...

Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us!

The 10km race uses a handicap start system, slow-to-fast, spread over ~30 minutes. This gives everyone a chance to win. We'll use your estimated finish time to assign you a start time with others the same speed.

All 5k racers will start ~15min after the first 10km starters.

Race Day Details

Time: 10k starts at 8:00 am + your handicap.*

5k starts approximately 15min after the first 10k starter.

Show up 30 minutes early to get your tag and warm up.

Location: Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado, 80229

Course: Both distances are out-and-back on a mix of paved and smooth gravel.

Parking: Plenty of parking at the park.

The Trophy Series races use a unique, handicap start and scoring system. 10k racers start from slow to fast giving everyone a chance to win. When you register and pick up your number, we'll help you choose an appropriate start time that fits your estimated time.

5k 10k Gravel Run

9830 Riverdale Road, Thornton, Colorado, 80229, United States
OpenStreetMap Google Maps

I Can 5k [runsignup.com]

Sat, Oct 03, 2026 at 9:00 AM

Description

You CAN 5k. This event is for EVERY ONE. EVERY BODY.

You won't get lost. You won't get forgotten. You'll run (or jog or walk or crawl) a clearly marked 5k course with friendly volunteers pointing the...

You CAN 5k. This event is for EVERY ONE. EVERY BODY.

You won't get lost. You won't get forgotten. You'll run (or jog or walk or crawl) a clearly marked 5k course with friendly volunteers pointing the way! We're going to keep you motivated and safe along the way. When you're done we'll be at the finish line with a huge smile and a high five to celebrate YOU, because YOU CAN 5k!!

Leading up to your race, you'll champion others to donate to one of the local event charities. As your donations grow, so does your swag bag!

3.1 Miles 5k Run Walk

Thornton, Colorado, 80233, United States
OpenStreetMap Google Maps

I Ain't Scared (of 5k) [runsignup.com]

Sat, Oct 31, 2026 at 9:15 AM

Description

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!

3.1 Miles 5k Run

E 108th Ave & Colorado Blvd, Thornton, Colorado, 80233, United States
OpenStreetMap Google Maps

WinterFest 5k & Fun Run [runsignup.com]

Sat, Dec 12, 2026 at 10:10 AM

Description

Kick off the holiday season with a spirited run/walk at Thornton's Carpenter Park. Choose from the chip-timed 5k, or experience the festive atmosphere in a shorter distance in our untimed Fun...

Kick off the holiday season with a spirited run/walk at Thornton's Carpenter Park. Choose from the chip-timed 5k, or experience the festive atmosphere in a shorter distance in our untimed Fun Run/Walk.

Stick around after for the festival, including Ice skating, Holiday Marketplace, Santa visits, and the Heated Beer Garden.

Celebrate the Best of Winter in Thornton, Colorado. You'll enjoy a warm drink at the finish line in your festive collectible mug.

For details about this event, click on the menu options under "Race Info" or scroll to the very bottom of this page for links to other pages on this site.

3.1 Miles 5k Fun Run Run Walk

3498 E 112th Ave, Thornton, Colorado, 80233, United States
OpenStreetMap Google Maps

5 events in Thornton, Colorado

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Local Clubs & Organizations