September 5Ks within 50 miles of Fort Collins, CO
Thornton, CO
RMRR Trophy Series - September
Sep 8, 2024
Greeley, CO
Superhero Event
Sep 21, 2024
Louisville, CO
Louisville Trail Race
Sep 28, 2024
Loveland, CO
The Blazing Brick 5K
Sep 21, 2024
Nederland, CO
Ned Ned Run
Sep 14, 2024
Estes Park, CO
Rut Run 5K
Sep 28, 2024
Boulder, CO
Friends of the National Center Science Stride 5K
Sep 14, 2024
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
Avery Brewing Company Oktoberfest 4K
Sep 22, 2024
CASA 5K
Sep 28, 2024
Boulderthon: Downtown Boulder Marathon
Sep 29, 2024
Lafayette, CO
Waneka Classic
Sep 7, 2024
Fort Collins, CO
Recovery Run of the Rockies 5K
Sep 1, 2024
Liberty-2-Liberty 5K
Sep 21, 2024
Mustang Music 5K
Sep 28, 2024
Niwot, CO
St. Vrain for the Brain 5K
Sep 21, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Recovery Run of the Rockies 5K
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Past DateSep 1, 2024Sunday
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5K run
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Fort Collins, CO
Larimer County, CO
2. South Boulder Creek parkrun
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Sep 6, 2025Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
3. Waneka Classic
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Past DateSep 7, 2024Saturday
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5K run
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Lafayette, CO
41 miles point to pointBoulder County, CO
4. RMRR Trophy Series - September
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Past DateSep 8, 2024Sunday
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10M, 5K run
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Thornton, CO
50 miles point to pointAdams County, CO
5. Friends of the National Center Science Stride 5K
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Past DateSep 14, 2024Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
6. Ned Ned Run
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Past DateSep 14, 2024Saturday
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13.1M, 10K, 5K trail run
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Nederland, CO
49 miles point to pointBoulder County, CO
7. South Boulder Creek parkrun
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Past DateSep 14, 2024Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
8. Cheyenne Schools Foundation - Run for 1
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Sep 20, 2025Saturday
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5K run
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Cheyenne, WY
41 miles point to pointLaramie County, WY
9. Great Bison Shuffle
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Past DateSep 21, 2024Saturday
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13.1M, 10K, 5K, 2K trail run | kids run
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Cheyenne, WY
41 miles point to pointLaramie County, WY
10. Liberty-2-Liberty 5K
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Past DateSep 21, 2024Saturday
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5K run
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Fort Collins, CO
Larimer County, CO
11. South Boulder Creek parkrun
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Past DateSep 21, 2024Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
12. St. Vrain for the Brain 5K
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Past DateSep 21, 2024Saturday
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5K run
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Niwot, CO
34 miles point to pointBoulder County, CO
13. Superhero Event
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Past DateSep 21, 2024Saturday
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10K, 5K, 1M run | kids run
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Greeley, CO
23 miles point to pointWeld County, CO
14. The Blazing Brick 5K
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Past DateSep 21, 2024Saturday
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5K run | kids run
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Loveland, CO
13 miles point to pointLarimer County, CO
15. Avery Brewing Company Oktoberfest 4K
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Past DateSep 22, 2024Sunday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
16. CASA 5K
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Sep 28, 2024Saturday
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5K run
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Boulder, CO
41 miles point to pointBoulder County, CO
17. Highland Homecoming 5K Run
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Sep 28, 2024Saturday
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5K run
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Ault, CO
19 miles point to pointWeld County, CO
18. Louisville Trail Race
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Sep 28, 2024Saturday
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13.1M, 10K, 5K trail run
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Louisville, CO
42 miles point to pointBoulder County, CO
19. Miner Gold Rush
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Sep 28, 2024Saturday
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5K, 1M run
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Broomfield, CO
46 miles point to pointBroomfield County, CO
20. Mustang Music 5K
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Sep 28, 2024Saturday
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5K, 1M run
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Fort Collins, CO
Larimer 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.