May Classic Runs within 50 miles of Denver, CO on Sundays
1. Altitude Elementary Moose Mudder
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May 4, 2025Sunday
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5K, 1K run
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Aurora, CO
8 miles point to pointArapahoe County, CO
2. Longmont Half Marathon
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May 4, 2025Sunday
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13.1M, 5K run
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Longmont, CO
30 miles point to pointBoulder County, CO
3. RMRR Trophy Series - May
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Past DateMay 5, 2024Sunday
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5M, 5K run
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Denver, CO
Denver County, CO
4. Colorado Women's Classic - Westminster
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May 11, 2025Sunday
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10M, 10K, 5K run | kids run
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Women Only
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Westminster, CO
7 miles point to pointAdams County, COJefferson County, CO
5. Mothers Day 5K
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May 11, 2025Sunday
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5K run
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Denver, CO
Denver County, CO
6. 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
9 miles point to pointAdams County, CO
7. Denver Colfax Marathon
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May 18, 2025Sunday
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26.2M, 13.1M, 10M run | 26.2M relay
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Boston Marathon Qualifier
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Denver, CO
Denver County, CO
8. Miles for Smiles 5K
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Past DateMay 19, 2024Sunday
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5K run | kids run
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Arvada, CO
6 miles point to pointJefferson 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.