October Races within 50 miles of Erie, CO
Evergreen, CO
EAPL Zombie Run 5K
Oct 27, 2024
Longmont, CO
Paws in the Park
Oct 5, 2024
Trojan Trot 5K
Oct 12, 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
International Taco Bell 50K
Oct 4, 2025
Miles for Moms
Oct 4, 2025
Hot Chocolate 15K/5K
Oct 5, 2025
Ghosts and Goblins 5K/10K
Oct 26, 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
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
Erie, CO
Eerie Erie
Oct 26, 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
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
Morrison, CO
Run the Rocks
Oct 13, 2024
Beware the Bear Trail Races
Oct 26, 2024
Great Trailhead Foot Race
Oct 18, 2025
Windsor, CO
Windsor Marathon
Oct 6, 2024
Commerce City, CO
Wild For Life Triathlon
Oct 13, 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
CSU Homecoming 5K
Oct 26, 2024
Long View Marathon
Oct 11, 2025
Blue Sky Trail Marathon
Oct 18, 2025
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
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.
1. International Taco Bell 50K
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Oct 4, 2025Saturday
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50K run
More Information
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Denver, CO
22 miles point to pointDenver County, CO
2. 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
22 miles point to pointDenver County, CO
3. Miles for Moms
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Oct 4, 2025Saturday
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run
More Information
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Denver, CO
22 miles point to pointDenver County, CO
4. 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
15 miles point to pointAdams County, COJefferson County, CO
5. 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
34 miles point to pointLarimer County, CO
6. 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
12 miles point to pointBoulder County, CO
7. 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
15 miles point to pointAdams County, COJefferson County, CO
8. 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
48 miles point to pointDouglas County, CO
9. 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
25 miles point to pointArapahoe County, CO
10. 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
22 miles point to pointDenver County, CO
11. Healthy Kids Running Series - Fort Collins
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Past DateOct 5, 2024Saturday
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kids run
More Information
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Fort Collins, CO
37 miles point to pointLarimer County, CO
12. Hot Chocolate 15K/5K - Denver
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Oct 5, 2025Sunday
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15K, 5K run
More Information
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Denver, CO
22 miles point to pointDenver County, CO
13. Paws in the Park
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Past DateOct 5, 2024Saturday
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5K run
More Information
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Longmont, CO
8 miles point to pointBoulder County, CO
14. RunAbilities FUN Walk/Run/Roll
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Past DateOct 5, 2024Saturday
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2M, 1M run
More Information
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Parker, CO
40 miles point to pointDouglas County, CO
15. Suffer Better Fall Trail Run
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Past DateOct 5, 2024Saturday
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50K, 25K trail run
More Information
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Pine, CO
47 miles point to pointJefferson County, CO
16. Michael J. Fox Foundation Run
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Past DateOct 6, 2024Sunday
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5K run
More Information
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Denver, CO
22 miles point to pointDenver County, CO
17. RMRR Trophy Series - October
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Past DateOct 6, 2024Sunday
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12K, 5K run
More Information
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Aurora, CO
25 miles point to pointArapahoe County, CO
18. Strides for Sierra 5K
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Past DateOct 6, 2024Sunday
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5K, 1K run
More Information
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Arvada, CO
17 miles point to pointJefferson County, CO
19. Windsor Marathon
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Past DateOct 6, 2024Sunday
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26.2M, 13.1M, 10K, 5K run | kids run
More Information
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Windsor, CO
31 miles point to pointWeld County, CO
20. Long View Marathon
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Oct 11, 2025Saturday
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26.2M, 13.1M, 5K run
More Information
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Boston Marathon Qualifier
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startFort Collins, CO37 miles point to pointfinishLoveland, CO24 miles point to pointLarimer County, COLarimer 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.