May Classic Races within 50 miles of Greeley, CO
Denver, CO
RMRR Trophy Series - May
May 5, 2024
Girls on the Run 5K
May 18, 2024
Mothers Day 5K
May 11, 2025
Denver Colfax Marathon
May 18, 2025
May 17, 2025
Aurora, CO
Altitude Elementary Moose Mudder
May 5, 2024
Westminster, CO
Colorado Women's Classic - Westminster
May 11, 2025
Berthoud, CO
Bob Turner Classic 5K
May 4, 2024
Loveland, CO
New Vision 5K
May 4, 2024
Run For The Trees
May 4, 2024
Run for the Trees - BSBF 2 Mile Run
May 4, 2024
Know. Grow. GO RUN 5K
May 17, 2024
Arvada, CO
Hope House 5K & Fun Run
May 4, 2024
CMRA Tucker Lake 6.5 Mile
May 11, 2024
Miles for Smiles 5K
May 19, 2024
Boulder, CO
Dash & Dine 5K Series
Apr 30, 2024
May 7, 2024
May 14, 2024
May 21, 2024
Boulder Mothers Day Run
May 12, 2024
Boulder Stroke & Stride Series
May 30, 2024
Jun 5, 2024
Jun 13, 2024
Jun 20, 2024
5 more
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
BOLDERBoulder 10K
May 26, 2025
Brighton, CO
Adams County Foster Care 5K
May 4, 2024
Firestone, CO
Carbon Valley Half Marathon
May 11, 2024
Keenesburg, CO
We Care Community 5K
May 4, 2024
Fort Collins, CO
Healthy Kids Running Series
Apr 27, 2024
May 4, 2024
May 18, 2024
May 25, 2024
1 more
Quad Rock 50
May 11, 2024
Healing Warriors Program 5K Fun Run
May 19, 2024
Colorado Marathon
May 4, 2025
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Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. South Boulder Creek parkrun
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May 3, 2025Saturday
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5K run
More Information
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Boulder, CO
41 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
31 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
More Information
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Berthoud, CO
21 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
50 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
23 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
44 miles point to pointLarimer County, CO
7. Healthy Kids Running Series - Fort Collins
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Past DateMay 4, 2024Saturday
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kids run
More Information
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Fort Collins, CO
23 miles point to pointLarimer County, CO
8. Hope House 5K & Fun Run
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Past DateMay 4, 2024Saturday
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5K, 1M run
More Information
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Arvada, CO
47 miles point to pointJefferson County, CO
9. New Vision 5K
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Past DateMay 4, 2024Saturday
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5K run
More Information
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Loveland, CO
19 miles point to pointLarimer County, CO
10. Run For The Trees
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Past DateMay 4, 2024Saturday
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2M run
More Information
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Loveland, CO
19 miles point to pointLarimer County, CO
11. Run for the Trees - BSBF 2 Mile Run
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Past DateMay 4, 2024Saturday
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2M run
More Information
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Loveland, CO
19 miles point to pointLarimer County, CO
12. We Care Community 5K
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Past DateMay 4, 2024Saturday
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5K run
More Information
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Keenesburg, CO
24 miles point to pointWeld County, CO
13. Altitude Elementary Moose Mudder
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Past DateMay 5, 2024Sunday
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5K, 1K run
More Information
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Aurora, CO
48 miles point to pointArapahoe County, CO
14. RMRR Trophy Series - May
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Past DateMay 5, 2024Sunday
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5M, 5K run
More Information
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Denver, CO
50 miles point to pointDenver County, CO
15. Dash & Dine 5K Series
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Past DateMay 7, 2024Tuesday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
16. South Boulder Creek parkrun
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May 10, 2025Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
17. 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
More Information
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Firestone, CO
25 miles point to pointWeld County, CO
18. 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
47 miles point to pointJefferson County, CO
19. Colorado Women's Classic - Westminster
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May 11, 2025Sunday
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10M, 10K, 5K run | kids run
More Information
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Women Only
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Westminster, CO
44 miles point to pointAdams County, COJefferson County, CO
20. Girls on the Run 5K
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Past DateMay 11, 2024Saturday
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5K run
More Information
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Longmont, CO
27 miles point to pointBoulder 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.