April 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. Run the Ranch
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Past DateApr 5, 2024Friday
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10K, 5K trail run
More Information
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Loveland, CO
11 miles point to pointLarimer County, CO
2. South Boulder Creek parkrun
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Apr 5, 2025Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
3. Raptor Run
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Past DateApr 6, 2024Saturday
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5K run
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Brighton, CO
34 miles point to pointAdams County, CO
4. Run the Ranch
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Past DateApr 6, 2024Saturday
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12H, 6H, 4H trail run | 12H relay
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Loveland, CO
11 miles point to pointLarimer County, CO
5. Boulder Rez Half
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Past DateApr 13, 2024Saturday
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13.1M, 10K, 5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
6. Horsetooth Half Marathon
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Apr 13, 2025Sunday
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13.1M run
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Fort Collins, CO
12 miles point to pointLarimer County, CO
7. South Boulder Creek parkrun
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Past DateApr 13, 2024Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
8. Spring Fling Prairie Dog Half
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Apr 13, 2025Sunday
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13.1M, 10K, 5K run | kids run
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Arvada, CO
48 miles point to pointJefferson County, CO
9. The Diabetes Link at CU 5K Run/Walk
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Past DateApr 13, 2024Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
10. Boulder Track Series Meet 1
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Past DateApr 14, 2024Sunday
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track meet
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Longmont, CO
24 miles point to pointBoulder County, CO
11. All-Out Beat the Heat
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Apr 19, 2025Saturday
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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
12. Earth Day 5K/10K
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Past DateApr 20, 2024Saturday
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10K, 5K run | kids run
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Loveland, CO
11 miles point to pointLarimer County, CO
13. Five Star Fun Run and 5K
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Past DateApr 20, 2024Saturday
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5K, 1M run
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Brighton, CO
34 miles point to pointAdams County, CO
14. Great Western Trail Race
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Past DateApr 20, 2024Saturday
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13.1M, 10K, 5K run | kids run
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Severance, CO
4 miles point to pointWeld County, CO
15. Healthy Kids Running Series - Fort Collins
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Past DateApr 20, 2024Saturday
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kids run
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Fort Collins, CO
12 miles point to pointLarimer County, CO
16. South Boulder Creek parkrun
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Past DateApr 20, 2024Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
17. Time Travel Half Marathon
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Past DateApr 20, 2024Saturday
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13.1M, 10K, 5K run
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Westminster, CO
45 miles point to pointAdams County, COJefferson County, CO
18. Blue Heron Half and 5K
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Past DateApr 21, 2024Sunday
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13.1M, 5K run
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Brighton, CO
34 miles point to pointAdams County, CO
19. Healthy Kids Running Series - Fort Collins
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Apr 27, 2024Saturday
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kids run
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Fort Collins, CO
12 miles point to pointLarimer County, CO
20. NOCO Half Marathon & 10K
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Apr 27, 2024Saturday
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13.1M, 10K run
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Loveland, CO
11 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.