October Races in Colorado
Evergreen, CO
EAPL Zombie Run 5K
Oct 25, 2020
Glenwood Springs, CO
Glenwood Canyon Shuffle
Oct 3, 2020
Greeley, CO
Live United 5K Steps for Stability
Oct 31, 2020
Denver, CO
Grace Race 5K
Oct 5, 2019
Roadrunners 5K
Oct 5, 2019
Victory Lap
Oct 5, 2019
AVS 5K
Oct 6, 2019
The Odyssey Odyssey
Oct 13, 2019
Scream Scram 5K
Oct 18, 2019 - postponed for 2019
Just for J Superhero 5K
Oct 3, 2020
Welcome Back Denver 5K
Oct 10, 2020
Brunch Run
Oct 11, 2020
5x5K FOR GOOD Denver
Oct 16, 2020
Rock 'n' Roll Denver
Oct 18, 2020
Oct 17, 2020
Step Beyond Celiac 5K
Oct 18, 2020
Monster Dash Run Denver
Oct 25, 2020
Hot Chocolate 15K/5K Denver
Oct 3, 2021
Oh, Fudge! 5K
Oct 3, 2021
Colfax 5K
Oct 16, 2021
Colfax Marathon
Oct 17, 2021
Day of the Dead 5K
Oct 24, 2021
Crested Butte, CO
Crested Butte Ultra
Oct 2, 2021
Colorado Springs, CO
TESSA 5K Survivors' Run
Oct 5, 2019
Halloween Half Colorado Springs
Oct 19, 2019
Cheyenne Mountain Trail Race
Oct 24, 2020
Nielson Two Mile Challenge
Mar 6, 2021
Apr 3, 2021
May 1, 2021
Jun 5, 2021
8 more
Bear Creek Endurance Run
Oct 2, 2021
Pikes Peak Road Runners Fall Series
Oct 17, 2021
Oct 3, 2021
Nov 14, 2021
Oct 31, 2021
Pikes Peak Road Runners Kids Fall Series - North Monument Valley Park
Oct 3, 2021
Oct 17, 2021
Oct 31, 2021
Nov 14, 2021
Cheyenne Mountain Run
Oct 9, 2021
Fox Run Endurance Run
Oct 23, 2021
Aurora, CO
Healthy Kids Running Series
Sep 13, 2020
Sep 20, 2020
Sep 27, 2020
Oct 4, 2020
1 more
RMRR Trophy Series - October
Oct 4, 2020
Durango, CO
Journey of Hope 5K
Oct 5, 2019
Animas Mug Run
Oct 13, 2019
Narrow Gauge 10 Mile
Oct 17, 2020
Fruita, CO
Hope of the Grand Valley 5K/10K
Oct 17, 2020
Golden, CO
Grizzly Growl 5K
Oct 6, 2019
GOGO Goosetown 5K
Oct 13, 2019
Coyote Classic
Oct 20, 2019
All-Out Kooky-Spooky
Oct 31, 2021
Centennial, CO
Hoofin' It Through the Hollows 5K
Oct 24, 2020
Englewood, CO
Great Pumpkin Haul
Oct 5, 2019 - cancelled for 2020
Erie, CO
Eerie Erie
Oct 26, 2019
Louisville, CO
Monster Dash Run
Oct 25, 2020
Castle Rock, CO
Race For Chase
Oct 6, 2019
VetFest 5K/10K
Oct 19, 2019
Loveland, CO
Long View Marathon
Oct 4, 2020
River's Edge PR Invite
Oct 31, 2020
Narrowleaf Lake Run
Oct 24, 2021
Broomfield, CO
Runway 5K Run for the Angels
Oct 3, 2020
Littleton, CO
The Stride
Oct 27, 2019
Second Wind Walk/Run
Oct 3, 2020
Estes Park, CO
Rut Run 5K
Oct 3, 2020
Leadville, CO
Haunted Hills Costume Run
Oct 27, 2019
Morrison, CO
West Side Best Side - Fehringer Ranch Race
Oct 6, 2019
Run the Rocks
Oct 11, 2020
Beware the Bear Trail Races
Oct 24, 2020
Great Trailhead Foot Race
Oct 16, 2021
Wheat Ridge, CO
Pete and Paul 5K
Oct 5, 2019
Gunnison, CO
Sage Burner Trail Run
Oct 16, 2021
Telluride, CO
Deep Creek Trail Half Marathon
Oct 5, 2019
Windsor, CO
Windsor Marathon
Oct 10, 2021
Lakewood, CO
Spooktacular Brew Run
Oct 24, 2020
Montrose, CO
Sweet Feet 5K
Oct 6, 2019
Cedaredge, CO
AppleFest 5K
Oct 2, 2021
Bayfield, CO
Badges Against Breast Cancer 5K
Oct 26, 2019
Firestone, CO
Pre Dress-Up Dash
Oct 5, 2019
Northglenn, CO
NW Open Spaces 5K XC PR Challenge
Oct 30, 2020
Sedalia, CO
Indian Creek Fifties
Oct 16, 2021
Yuma, CO
5K To Yuma
Oct 17, 2020
Alamosa, CO
Splashland Sprint Triathlon
Oct 17, 2020
La Veta, CO
Spanish Peaks Downhill Half Marathon
Oct 3, 2020
Fort Collins, CO
CSU Homecoming 5K
Oct 5, 2019
Friend Day 5K
Oct 12, 2019
CSU Veterans 5K
Oct 26, 2019
Phantom 4 Miler
Oct 26, 2019
Long View Marathon
Oct 4, 2020
Run Fur Fun 5K
Oct 17, 2020
Blue Sky Trail Marathon
Oct 16, 2021
Atwood, CO
Baseggio Halloween Hustle
Oct 26, 2019
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Event Category
Click Here to find out what Classic, Multisport, and Variety mean.
To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.
To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.
City Location
1. Bear Creek Endurance Run
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Oct 2, 2021Saturday
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12H trail run
More Information
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Colorado Springs, CO
El Paso County, CO
2. AppleFest 5K
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Oct 2, 2021Saturday
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5K run
Race Website
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Cedaredge, CO
Delta County, CO
3. Aspen parkrun
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CancelledOct 2, 2021Saturday
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5K run
More Information
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Aspen, CO
Pitkin County, CO
4. Crested Butte Ultra
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Oct 2, 2021Saturday
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105K, 55K trail run
More Information
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Crested Butte, CO
Gunnison County, CO
5. Nielson Two Mile Challenge
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Oct 2, 2021Saturday
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2M trail run
More Information
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Colorado Springs, CO
El Paso County, CO
6. South Boulder Creek parkrun
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CancelledOct 2, 2021Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
7. Glenwood Canyon Shuffle
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On-Site RaceCancelledOct 3, 2020SaturdayVirtual Option
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13.1M, 5K run
Race Reference
-
Glenwood Springs, CO
Garfield County, CO
8. Hot Chocolate 15K/5K Denver
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Oct 3, 2021Sunday
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15K, 5K run
Race Web Page
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Denver, CO
Denver County, CO
9. Its Fall Yall 5K and K9 Canter 1M Fun Run
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Oct 3, 2021Sunday
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5K, 1M run
More Information
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Westminster, CO
Adams County, COJefferson County, CO
10. Just for J Superhero 5K
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Past DateOct 3, 2020Saturday
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5K, 1M run
Race Web Page
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Denver, CO
Denver County, CO
11. Oh, Fudge! 5K
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Oct 3, 2021Sunday
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5K run | kids run
Race Information
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Denver, CO
Denver County, CO
12. Pikes Peak Road Runners Fall Series
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Oct 3, 2021Sunday
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3.1M trail run
More Information
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Colorado Springs, CO
El Paso County, CO
13. Pikes Peak Road Runners Kids Fall Series - North Monument Valley Park
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Oct 3, 2021Sunday
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kids run
More Information
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Colorado Springs, CO
El Paso County, CO
14. Rim To Rim Royal Gorge Race Weekend
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CancelledOct 3, 2020Saturday
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10K, 5K run
Race Website
- Canon City, CO
15. Runway 5K Run for the Angels
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On-Site RacePast DateOct 3, 2020SaturdayVirtual Option
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5K run
More Information
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Broomfield, CO
Broomfield County, CO
16. Rut Run 5K
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Past DateOct 3, 2020Saturday
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5K run
Race Web Page
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Estes Park, CO
Larimer County, CO
17. Second Wind Walk/Run
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CancelledOct 3, 2020Saturday
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5K run
Race Website
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Littleton, CO
Arapahoe County, CO
18. Spanish Peaks Downhill Half Marathon
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Past DateOct 3, 2020Saturday
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13.1M, 5K run | kids run
Race Web Page
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La Veta, CO
Huerfano County, CO
19. Healthy Kids Running Series - Aurora
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CancelledOct 4, 2020Sunday
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kids run
More Information
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Aurora, CO
Arapahoe County, CO
20. Long View Marathon
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Past DateOct 4, 2020Sunday
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26.2M, 13.1M run
More Information
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Boston Marathon Qualifier
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startFort Collins, COfinishLoveland, COLarimer County, COLarimer County, CO
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ALWAYS visit the race's website for the most complete and accurate race information.
ALWAYS visit the race's website for the most complete and accurate race information.