October Races in Colorado
Evergreen, CO
EAPL Zombie Run 5K
Oct 25, 2020
Glenwood Springs, CO
Glenwood Canyon Shuffle
Oct 2, 2021
Thornton, CO
I Aint Scared
Oct 31, 2021
Denver, CO
AVS 5K
Oct 6, 2019
The Odyssey Odyssey
Oct 13, 2019
Just for J Superhero 5K
Oct 3, 2020
Welcome Back Denver 5K
Oct 10, 2020
Monster Dash Run Denver
Oct 25, 2020
Hot Chocolate 15K/5K
Oct 3, 2021
Oh, Fudge! 5K
Oct 3, 2021
bRUNch Run
Oct 10, 2021
Denver Colfax Marathon
Oct 16, 2021
Oct 17, 2021
Colfax 5K
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
Nielson Two Mile Challenge
Mar 5, 2022
Apr 2, 2022
May 7, 2022
Jun 4, 2022
8 more
Bear Creek Endurance Run
Oct 2, 2021
Colorado Springs Marathon
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
Cheyenne Mountain Trail Run
Oct 9, 2021
Bobcat Trail Races
Oct 23, 2021
Fox Run Endurance Run
Oct 23, 2021
Aurora, CO
Arapahoe County 5K Trail Walk/Run Series
Apr 10, 2021
Jun 12, 2021
Aug 14, 2021
Oct 9, 2021
FVLD Fun Run & Walk
Oct 9, 2021
Fruita, CO
Hope of the Grand Valley 5K/10K
Oct 17, 2020
Grand Junction, CO
Panda Waddle 5K
Oct 30, 2021
Golden, CO
GOGO Goosetown 5K
Oct 13, 2019
Coyote Classic
Oct 20, 2019
All-Out Kooky-Spooky
Oct 31, 2021
Steamboat Springs, CO
Foundry Halloween 5K
Oct 31, 2020
Centennial, CO
Hoofin' It Through the Hollows 5K
Oct 23, 2021
Westminster, CO
Big Waves Family 5K
Oct 2, 2021
Its Fall Yall 5K and K9 Canter 1M Fun Run
Oct 3, 2021
Westy Half
Oct 24, 2021
Englewood, CO
Great Pumpkin Haul
Oct 5, 2019
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
River's Edge PR Invite
Oct 31, 2020
Long View Marathon
Oct 3, 2021
Harvest Night
Oct 16, 2021
Narrowleaf Lake Run
Oct 24, 2021
Broomfield, CO
Runway 5K Run for the Angels
Oct 3, 2020
Aspen, CO
Aspen parkrun
Mar 26, 2022
Apr 2, 2022
Apr 9, 2022
Apr 16, 2022
48 more
Aspen Valley Marathon
Oct 16, 2021
Littleton, CO
Healthy Kids Running Series
Sep 25, 2021
Oct 2, 2021
Oct 9, 2021
Oct 16, 2021
1 more
Justice Run
Oct 3, 2021
The Stride
Oct 24, 2021
Arvada, CO
Lisa Nelson's Mustang Stampede
Oct 2, 2021
Estes Park, CO
Rut Run 5K
Oct 3, 2020
Boulder, CO
South Boulder Creek parkrun
Mar 26, 2022
Apr 2, 2022
Apr 9, 2022
Apr 16, 2022
48 more
Boulderthon: Downtown Boulder Marathon & Half Marathon
Oct 10, 2021
Leadville, CO
Haunted Hills Costume Run
Oct 27, 2019
Breckenridge, CO
Breckenridge Road Marathon
Oct 9, 2021
Lafayette, CO
Lafayette Oatmeal 5K
Oct 23, 2021
Morrison, CO
West Side Best Side - Fehringer Ranch Race
Oct 6, 2019
Run the Rocks
Oct 10, 2021
Beware the Bear Trail Races
Oct 17, 2021
Great Trailhead Foot Race
Oct 30, 2021
Trinidad, CO
Rad Dirt Fest
Oct 3, 2021
Gunnison, CO
Sage Burner Trail Run
Oct 16, 2021
Palisade, CO
Grand Valley Half Marathon
Oct 9, 2021
Telluride, CO
Deep Creek Trail Half Marathon
Oct 2, 2021
Windsor, CO
Windsor Marathon
Oct 10, 2021
Lakewood, CO
Spooktacular Brew Run
Oct 24, 2020
Montrose, CO
Sweet Feet 5K
Oct 6, 2019
Black Canyon Triathlon
Oct 2, 2021
Black Canyon Ascent 6M
Oct 16, 2021
Commerce City, CO
Foam Glow Denver
Oct 30, 2021
Cedaredge, CO
AppleFest 5K
Oct 2, 2021
Firestone, CO
Pre Dress-Up Dash
Oct 5, 2019
Northglenn, CO
NW Open Spaces 5K XC PR Challenge
Oct 30, 2020
Mancos, CO
Mancos Cowboy Half Marathon
Oct 16, 2021
Sedalia, CO
Indian Creek Fifties
Oct 16, 2021
Alamosa, CO
Splashland Sprint Triathlon
Oct 16, 2021
Fort Collins, CO
Run Fur Fun 5K
Oct 17, 2020
Healthy Kids Running Series
Sep 19, 2021
Sep 26, 2021
Oct 10, 2021
Oct 17, 2021
1 more
Long View Marathon
Oct 3, 2021
Colorado Brewery Running Series - New Belgium Brewing
Oct 9, 2021
CSU Homecoming 5K
Oct 9, 2021
Blue Sky Trail Marathon
Oct 16, 2021
Friend Day 5K
Oct 16, 2021
Colorado Marathon
Oct 24, 2021
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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. Old Fort XC Classic
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Oct 1, 2021Friday
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8K, 5K trail run
More Information
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Durango, CO
La Plata County, CO
2. AppleFest 5K
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Oct 2, 2021Saturday
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5K run
More Information
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Cedaredge, CO
Delta County, CO
3. Aspen parkrun
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Oct 2, 2021Saturday
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5K run
More Information
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Aspen, CO
Pitkin County, CO
4. 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
5. Big Waves Family 5K
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Oct 2, 2021Saturday
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5K run
More Information
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Westminster, CO
Adams County, COJefferson County, CO
6. Black Canyon Triathlon
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Oct 2, 2021Saturday
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sprint triathlon
More Information
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Montrose, CO
Montrose County, CO
7. Colorado Springs Marathon
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Oct 2, 2021Saturday
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26.2M, 13.1M, 5K run | kids run
Virtual OptionMore Information
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Colorado Springs, CO
El Paso County, CO
8. 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
9. Deep Creek Trail Half Marathon
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Oct 2, 2021Saturday
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13.1M trail run
More Information
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Telluride, CO
San Miguel County, CO
10. Glenwood Canyon Shuffle
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Oct 2, 2021Saturday
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13.1M, 5K run
More Information
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Glenwood Springs, CO
Garfield County, CO
11. Healthy Kids Running Series - Littleton
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Oct 2, 2021Saturday
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kids run
More Information
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Littleton, CO
Arapahoe County, CO
12. Lisa Nelson's Mustang Stampede
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Oct 2, 2021Saturday
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5K run
More Information
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Arvada, CO
Jefferson County, CO
13. 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
14. Rim to Rim Royal Gorge Races
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Oct 2, 2021Saturday
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10K, 5K run
More Information
- Canon City, CO
15. South Boulder Creek parkrun
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Oct 2, 2021Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
16. Healthy Kids Running Series - Fort Collins
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Oct 3, 2021Sunday
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kids run
More Information
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Fort Collins, CO
Larimer County, CO
17. Hot Chocolate 15K/5K - Denver
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Oct 3, 2021Sunday
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15K, 5K run
More Information
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Denver, CO
Denver County, CO
18. 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
19. Just for J Superhero 5K
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Past DateOct 3, 2020Saturday
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5K, 1M run
More Information
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Denver, CO
Denver County, CO
20. Justice Run
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Oct 3, 2021Sunday
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10K, 5K run | kids run
More Information
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Littleton, CO
Arapahoe County, CO
For the love of all that Is good And moisture wicking...
Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.
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.