October Races in Colorado
Evergreen, CO
EAPL Zombie Run 5K
Oct 27, 2024
Longmont, CO
Paws in the Park
Oct 5, 2024
Trojan Trot 5K
Oct 12, 2024
Glenwood Springs, CO
Halloween Hustle for Charity 5K
Oct 20, 2024
Greeley, CO
Redrum Fun Run
Oct 26, 2024
Denver, CO
D'Evelyn Dash
Oct 4, 2024
Grace Race 5K
Oct 5, 2024
Michael J. Fox Foundation Run
Oct 6, 2024
Pumpkin Carry
Oct 12, 2024
bRUNch Run
Oct 13, 2024
Liberty Energy 5K
Oct 19, 2024
MonsterDash Run
Oct 26, 2024
The Odyssey Odyssey
Oct 27, 2024
Miles for Moms
Oct 4, 2025
Hot Chocolate 15K/5K
Oct 5, 2025
Ghosts and Goblins 5K/10K
Oct 26, 2025
Crested Butte, CO
Camp 4 Coffee Cart to Cart
Oct 5, 2024
Camp 4 Coffee Cart to Cart Trail Race
Oct 5, 2024
Colorado Springs, CO
Pikes Peak Road Runners Fall Series
Oct 20, 2024
Oct 6, 2024
Nov 17, 2024
Nov 3, 2024
Pikes Peak Road Runners Kids Fall Series
Oct 6, 2024
Oct 20, 2024
Nov 3, 2024
Nov 17, 2024
Bobcat Trail Race
Oct 19, 2024
Trick or Trot
Oct 26, 2024
Nielson Two Mile Challenge
Mar 1, 2025
Apr 5, 2025
May 3, 2025
Jun 7, 2025
8 more
Colorado Springs Marathon
Oct 4, 2025
Aurora, CO
CU DPT Thera-Trot
Oct 5, 2024
RMRR Trophy Series - October
Oct 6, 2024
ASDAsh 5K to Beat Tooth Decay
Oct 12, 2024
Expo Park XC
Oct 20, 2024
EDT XC Showdown
Oct 12, 2025
Idaho Springs, CO
Halloween Fun Run
Oct 26, 2024
Grand Junction, CO
Grand Valley Brew Runs
Oct 19, 2024 - BOO Run
Nov 16, 2024 - Mustache Run
Dec 14, 2024 - Ugly Sweater Run
Woodland Park, CO
Above the Clouds Ultra
Oct 5, 2024
Steamboat Springs, CO
Foundry Halloween 5K
Oct 26, 2024
Centennial, CO
Hoofin' It Through the Hollows 5K
Oct 26, 2024
Parker, CO
RunAbilities FUN Walk/Run/Roll
Oct 5, 2024
Westminster, CO
Big Waves Family 5K
Oct 5, 2024
Not So Flatt Breast Cancer Awareness Run/Walk
Oct 4, 2025
Westy Half & 5K
Oct 12, 2025
Manitou Springs, CO
Mustang 5K
Oct 11, 2025
Erie, CO
Eerie Erie
Oct 26, 2024
Pueblo, CO
Paws for Life Fun Run/Walk 5K
Oct 5, 2024
Harvest Fest
Oct 12, 2024
Lions Roar for Fitness 5K/2.5K Challenge
Oct 12, 2024
Louisville, CO
MonsterDash Run
Oct 27, 2024
Castle Rock, CO
Castle Rock Trail Festival
Oct 5, 2024
Littleton, CO
The Stride
Oct 27, 2024
Frisco, CO
Girls on the Run 5K
Oct 26, 2024
Estes Park, CO
Rocky's Backyard Ultra Race
Oct 4, 2025
Boulder, CO
Boulder XC Series Meet 1
Oct 12, 2024
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
Brighton, CO
The Arc of Adams County All-Ability Halloween 5K Run/Walk
Oct 12, 2024
Gummball 5K
Oct 19, 2024
Breckenridge, CO
Breckenridge Road Marathon
Oct 11, 2025
Morrison, CO
Run the Rocks
Oct 13, 2024
Beware the Bear Trail Races
Oct 26, 2024
Great Trailhead Foot Race
Oct 18, 2025
Trinidad, CO
Dead Man 5K Trail Run
Oct 5, 2024
Gunnison, CO
Sage Burner Trail Run
Oct 12, 2024
Windsor, CO
Windsor Marathon
Oct 6, 2024
Canon City, CO
Rim to Rim Royal Gorge Races
Oct 4, 2025
Commerce City, CO
Wild For Life Triathlon
Oct 13, 2024
Palmer Lake, CO
YMCA Creepy Crawl 5K
Oct 26, 2024
Mancos, CO
Mancos Cowboy Half Marathon
Oct 19, 2024
Sedalia, CO
Indian Creek Trail Runs
Oct 18, 2025
Fort Collins, CO
Healthy Kids Running Series
Sep 7, 2024
Sep 14, 2024
Sep 28, 2024
Oct 5, 2024
1 more
Long View Marathon
Oct 12, 2024
Blue Sky Trail Marathon
Oct 19, 2024
CSU Homecoming 5K
Oct 26, 2024
Crawford, CO
West Elk Challenge
Oct 4, 2025
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Event Category
Click Here to find out what Classic, Multisport, and Variety mean.
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To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.
City Location
1. AppleFest 5K
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Oct 4, 2025Saturday
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5K run
More Information
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Cedaredge, CO
Delta County, CO
2. Aspen parkrun
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Oct 4, 2025Saturday
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5K run
More Information
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Aspen, CO
Pitkin County, CO
3. Colorado Springs Marathon
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Oct 4, 2025Saturday
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26.2M, 13.1M, 5K run | kids run
More Information
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Colorado Springs, CO
El Paso County, CO
4. D'Evelyn Dash
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Past DateOct 4, 2024Friday
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5K, 2K run
More Information
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Denver, CO
Denver County, CO
5. Miles for Moms
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Oct 4, 2025Saturday
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run
More Information
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Denver, CO
Denver County, CO
6. Nielson Two Mile Challenge
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Oct 4, 2025Saturday
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2M trail run
More Information
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Colorado Springs, CO
El Paso County, CO
7. Not So Flatt Breast Cancer Awareness Run/Walk
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Oct 4, 2025Saturday
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10K, 5K run
More Information
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Westminster, CO
Adams County, COJefferson County, CO
8. Rim to Rim Royal Gorge Races
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Oct 4, 2025Saturday
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13.1M, 8M, 5K trail run
More Information
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Canon City, CO
Fremont County, CO
9. Rocky's Backyard Ultra Race
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Oct 4, 2025Saturday
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4.2M trail run | last man standing
More Information
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Estes Park, CO
Larimer County, CO
10. South Boulder Creek parkrun
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Oct 4, 2025Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
11. West Elk Challenge
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Oct 4, 2025Saturday
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26.2M trail run
More Information
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Crawford, CO
Delta County, CO
12. Above the Clouds Ultra
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Past DateOct 5, 2024Saturday
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50K, 10K trail run
More Information
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Woodland Park, CO
Teller County, CO
13. Big Waves Family 5K
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Past DateOct 5, 2024Saturday
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5K run
More Information
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Westminster, CO
Adams County, COJefferson County, CO
14. Camp 4 Coffee Cart to Cart
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Past DateOct 5, 2024Saturday
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19M, 10M trail run
More Information
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Crested Butte, CO
Gunnison County, CO
15. Camp 4 Coffee Cart to Cart Trail Race
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Past DateOct 5, 2024Saturday
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19M, 10M trail run
More Information
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Crested Butte, CO
Gunnison County, CO
16. Castle Rock Trail Festival
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Past DateOct 5, 2024Saturday
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50K, 13.1M, 10K, 5K trail run
More Information
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Castle Rock, CO
Douglas County, CO
17. CU DPT Thera-Trot
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Past DateOct 5, 2024Saturday
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5K run
More Information
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Aurora, CO
Arapahoe County, CO
18. Dead Man 5K Trail Run
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Past DateOct 5, 2024Saturday
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5K run
More Information
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Trinidad, CO
Las Animas County, CO
19. Fall festival 5K run walk Crawl
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Past DateOct 5, 2024Saturday
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5K, 1M run
More Information
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Akron, CO
Washington County, CO
20. Grace Race 5K
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Past DateOct 5, 2024Saturday
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5K run
More Information
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Denver, CO
Denver 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.