May Classic Runs within 50 miles of Windsor, CO on Weekends
1. South Boulder Creek parkrun
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May 3, 2025Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
2. Adams County Foster Care 5K
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Past DateMay 4, 2024Saturday
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5K, 1M run
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Brighton, CO
34 miles point to pointAdams County, CO
3. Bob Turner Classic 5K
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Past DateMay 4, 2024Saturday
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5K run
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Berthoud, CO
15 miles point to pointLarimer County, CO
4. Cinco de Mayo 5K
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Past DateMay 4, 2024Saturday
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5K run
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Cheyenne, WY
46 miles point to pointLaramie County, WY
5. Colorado Marathon
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May 4, 2025Sunday
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26.2M, 13.1M, 10K, 5K run | 26.2M relay
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Boston Marathon Qualifier
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Fort Collins, CO
12 miles point to pointLarimer County, CO
6. Duck Waddle 5K
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Past DateMay 4, 2024Saturday
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5K run
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Estes Park, CO
34 miles point to pointLarimer County, CO
7. Hope House 5K & Fun Run
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Past DateMay 4, 2024Saturday
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5K, 1M run
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Arvada, CO
48 miles point to pointJefferson County, CO
8. New Vision 5K
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Past DateMay 4, 2024Saturday
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5K run
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Loveland, CO
11 miles point to pointLarimer County, CO
9. Run For The Trees
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Past DateMay 4, 2024Saturday
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2M run
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Loveland, CO
11 miles point to pointLarimer County, CO
10. Run for the Trees - BSBF 2 Mile Run
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Past DateMay 4, 2024Saturday
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2M run
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Loveland, CO
11 miles point to pointLarimer County, CO
11. We Care Community 5K
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Past DateMay 4, 2024Saturday
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5K run
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Keenesburg, CO
33 miles point to pointWeld County, CO
12. South Boulder Creek parkrun
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May 10, 2025Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
13. Carbon Valley Half Marathon
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Past DateMay 11, 2024Saturday
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13.1M, 5K, 1M run | 13.1M relay | kids run
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Firestone, CO
25 miles point to pointWeld County, CO
14. CMRA Tucker Lake 6.5 Mile
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Past DateMay 11, 2024Saturday
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6.5M run
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Arvada, CO
48 miles point to pointJefferson County, CO
15. Girls on the Run 5K
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Past DateMay 11, 2024Saturday
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5K run
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Longmont, CO
24 miles point to pointBoulder County, CO
16. Run Like A Mother 5K
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Past DateMay 11, 2024Saturday
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5K run
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Cheyenne, WY
46 miles point to pointLaramie County, WY
17. Colorado Women's Classic - Westminster
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Past DateMay 12, 2024Sunday
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10M, 10K, 5K run | kids run
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Women Only
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Westminster, CO
45 miles point to pointAdams County, COJefferson County, CO
18. Head and Neck Cancer A Hard Thing to Swallow 5K/10K
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Past DateMay 12, 2024Sunday
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10K, 5K run
Virtual OptionMore Information
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Thornton, CO
42 miles point to pointAdams County, CO
19. South Boulder Creek parkrun
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May 17, 2025Saturday
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5K run
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Boulder, CO
38 miles point to pointBoulder County, CO
20. Dog Jog 5K
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Past DateMay 18, 2024Saturday
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5K run
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Cheyenne, WY
46 miles point to pointLaramie County, WY
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.