September 5Ks within 50 miles of Golden, CO
Thornton, CO
RMRR Trophy Series - September
Sep 8, 2024
Denver, CO
9/11 Heroes Run
Sep 8, 2024
Denver Rocks Run 5K/10K
Sep 8, 2024
Heroes and Villains Team Hope 5K Walk and Run
Sep 14, 2024
Nun Run
Sep 15, 2024
Montbello Alive! 5K
Sep 21, 2024
Move Forward 5K & 10K
Sep 21, 2024
RiNo 5K
Sep 21, 2024
Roadrunners 5K
Sep 28, 2024
Denver 5K
Sep 13, 2025
Aurora, CO
OCA Panda Run
Sep 21, 2024
Georgetown, CO
Colorado Brewery Running Series
Sep 28, 2024
Centennial, CO
Arapahoe County 5K Trail Run
Sep 12, 2024
Englewood, CO
Mile High Rescue 5K! Running for Rescues!
Sep 29, 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
Highlands Ranch, CO
BackCountry 5K
Sep 15, 2024
Littleton, CO
Firestorm 5K
Sep 7, 2024
Colorado Dup15q Believe Walk and 5K Run
Sep 14, 2024
HRCA Oktoberfest 5K
Sep 14, 2024
Flyin' Lion 5K
Sep 15, 2024
Miles 4 Madison 5K
Sep 21, 2024
Vitality Octa-Strong 5K
Sep 21, 2024
Second Wind Walk/Run
Sep 22, 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
Breckenridge, CO
Breckenridge Oktoberfest 5K
Sep 14, 2024
Lafayette, CO
Waneka Classic
Sep 7, 2024
Lone Tree, CO
For a City 5K
Sep 21, 2023
Morrison, CO
RRCC Front Nine 5K
Sep 15, 2024
Wheat Ridge, CO
Farmers 5000
Sep 15, 2024
Lakewood, CO
Tiger Prowl
Sep 15, 2024
Commerce City, CO
Night Nation Run - Denver
Sep 28, 2024
Monument, CO
Run4Hope 5K for Schools
Sep 21, 2024
Elizabeth, CO
Historic Elizabeth Main Street 5K
Sep 7, 2024
Niwot, CO
St. Vrain for the Brain 5K
Sep 21, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Labor Day Half Marathon
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Sep 1, 2025Monday
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13.1M, 10K, 5K run
More Information
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Parker, CO
29 miles point to pointDouglas County, CO
2. South Boulder Creek parkrun
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Sep 6, 2025Saturday
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5K run
More Information
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Boulder, CO
18 miles point to pointBoulder County, CO
3. Firestorm 5K
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Past DateSep 7, 2024Saturday
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5K run
More Information
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Littleton, CO
14 miles point to pointArapahoe County, CO
4. Historic Elizabeth Main Street 5K
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Past DateSep 7, 2024Saturday
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5K run | novelty run
More Information
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Elizabeth, CO
42 miles point to pointElbert County, CO
5. Waneka Classic
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Past DateSep 7, 2024Saturday
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5K run
More Information
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Lafayette, CO
18 miles point to pointBoulder County, CO
6. 9/11 Heroes Run - Denver
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Past DateSep 8, 2024Sunday
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5K run
More Information
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Denver, CO
12 miles point to pointDenver County, CO
7. Denver HOPErun
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Past DateSep 8, 2024Sunday
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5K run
More Information
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Golden, CO
Jefferson County, CO
8. Denver Rocks Run 5K/10K
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Past DateSep 8, 2024Sunday
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10K, 5K run
More Information
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Denver, CO
12 miles point to pointDenver County, CO
9. RMRR Trophy Series - September
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Past DateSep 8, 2024Sunday
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10M, 5K run
More Information
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Thornton, CO
15 miles point to pointAdams County, CO
10. Arapahoe County 5K Trail Run
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Past DateSep 12, 2024Thursday
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5K trail run
More Information
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Centennial, CO
21 miles point to pointArapahoe County, CO
11. All-Out Fall Fest
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Sep 13, 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
11 miles point to pointAdams County, COJefferson County, CO
12. Denver 5K
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Sep 13, 2025Saturday
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5K run
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Denver, CO
12 miles point to pointDenver County, CO
13. Breckenridge Oktoberfest 5K
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Past DateSep 14, 2024Saturday
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5K trail run
More Information
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Breckenridge, CO
47 miles point to pointSummit County, CO
14. Colorado Dup15q Believe Walk and 5K Run
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Past DateSep 14, 2024Saturday
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5K run
More Information
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Littleton, CO
14 miles point to pointArapahoe County, CO
15. Friends of the National Center Science Stride 5K
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Past DateSep 14, 2024Saturday
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5K run
More Information
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Boulder, CO
18 miles point to pointBoulder County, CO
16. Heroes and Villains Team Hope 5K Walk and Run
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Past DateSep 14, 2024Saturday
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5K run
More Information
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Denver, CO
12 miles point to pointDenver County, CO
17. HRCA Oktoberfest 5K
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Past DateSep 14, 2024Saturday
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5K run
More Information
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Littleton, CO
14 miles point to pointArapahoe County, CO
18. Ned Ned Run
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Past DateSep 14, 2024Saturday
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13.1M, 10K, 5K trail run
More Information
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Nederland, CO
21 miles point to pointBoulder County, CO
19. South Boulder Creek parkrun
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Past DateSep 14, 2024Saturday
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5K run
More Information
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Boulder, CO
18 miles point to pointBoulder County, CO
20. BackCountry 5K
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Past DateSep 15, 2024Sunday
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5K run
More Information
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Highlands Ranch, CO
19 miles point to pointDouglas 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.