September Races within 50 miles of Windsor, CO
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. Calarat Challenge Trail Running Festival
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Past DateSep 3, 2023Sunday
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13.1M, 10K, 5K trail run | kids run
More Information
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Jamestown, CO
36 miles point to pointBoulder County, CO
2. Black Squirrel Half Marathon
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Sep 7, 2024Saturday
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13.1M trail run
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Bellvue, CO
18 miles point to pointLarimer County, CO
3. Harvest Moon Long Course Triathlon
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Sep 7, 2024Saturday
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half triathlon | half duathlon
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Boulder, CO
38 miles point to pointBoulder County, CO
4. South Boulder Creek parkrun
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Sep 7, 2024Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
5. Honey Bee Hustle
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Sep 8, 2024Sunday
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1.5H run
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Loveland, CO
11 miles point to pointLarimer County, CO
6. RMRR Trophy Series - September
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Sep 8, 2024Sunday
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10M, 5K run
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Thornton, CO
42 miles point to pointAdams County, CO
7. Ned Ned Run
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Past DateSep 9, 2023Saturday
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13.1M, 10K, 5K trail run
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Nederland, CO
48 miles point to pointBoulder County, CO
8. Waneka Classic
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Past DateSep 9, 2023Saturday
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5K run
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Lafayette, CO
35 miles point to pointBoulder County, CO
9. RMRR Fall Marathon Training Series
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Past DateSep 10, 2023Sunday
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30K, 20K run
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Thornton, CO
42 miles point to pointAdams County, CO
10. All-Out Fall Fest
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Sep 14, 2024Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Boston Marathon Qualifier
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Westminster, CO
45 miles point to pointAdams County, COJefferson County, CO
11. Cerus Fitness Festival
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Sep 14, 2024Saturday
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5K obstacle run
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La Salle, CO
14 miles point to pointWeld County, CO
12. Cheyenne Schools Foundation - Run for 1
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Sep 14, 2024Saturday
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5K run
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Cheyenne, WY
46 miles point to pointLaramie County, WY
13. Jag Jog 5K
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Sep 14, 2024Saturday
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5K, 1M run
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Broomfield, CO
40 miles point to pointBroomfield County, CO
14. South Boulder Creek parkrun
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Sep 14, 2024Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
15. Colorado Brewery Running Series
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Sep 15, 2024Sunday
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5K run
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Longmont, CO
24 miles point to pointBoulder County, CO
16. Farmers 5000
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Sep 15, 2024Sunday
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5K run
Virtual OptionMore Information
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Wheat Ridge, CO
50 miles point to pointJefferson County, CO
17. Lisa Nelson's Mustang Stampede
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Past DateSep 16, 2023Saturday
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5K run
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Arvada, CO
48 miles point to pointJefferson County, CO
18. Miner's Day 5K
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CancelledSep 16, 2023Saturday
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5K run | kids run
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Frederick, CO
26 miles point to pointWeld County, CO
19. Adams Half & 5K
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Past DateSep 17, 2023Sunday
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13.1M, 5K run
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Brighton, CO
34 miles point to pointAdams County, CO
20. Red Feather Trail Jamboree
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Sep 20, 2024Friday
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50K trail run
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Red Feather Lakes, CO
43 miles point to pointLarimer 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.