September Classic Runs within 50 miles of Aurora, CO
Longmont, CO
Colorado Brewery Running Series
Sep 15, 2024
Thornton, CO
RMRR Fall Marathon Training Series
Aug 27, 2023
Sep 24, 2023
Sep 10, 2023
RMRR Trophy Series - September
Sep 8, 2024
Greeley, CO
Superhero Event
Sep 21, 2024
Denver, CO
9/11 Heroes Run
Sep 10, 2023
Sentir Venezolano 5K Walk / Run
Sep 17, 2023
Roadrunners 5K
Sep 30, 2023
Blue Shoe Run for Prostate Cancer
Sep 7, 2024
Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race
Sep 7, 2024
Denver Rocks Run 5K/10K
Sep 8, 2024
Colorado Brewery Running Series
Sep 14, 2024
Denver 5K
Sep 14, 2024
Nun Run
Sep 15, 2024
Move Forward 5K & 10K
Sep 21, 2024
Aurora, CO
OCA Panda Run
Sep 21, 2024
Golden, CO
Golden Gallop
Sep 22, 2024
Georgetown, CO
Colorado Brewery Running Series
Sep 28, 2024
Loveland, CO
Honey Bee Hustle
Sep 8, 2024
Broomfield, CO
Jag Jog 5K
Sep 14, 2024
Miner Gold Rush
Sep 28, 2024
Runway 5K Run for the Angels
Sep 28, 2024
Highlands Ranch, CO
BackCountry 5K
Sep 17, 2023
Littleton, CO
Lions Roar 5K
Sep 17, 2023
Lookin For A Cure Denver
Sep 23, 2023
Second Wind Walk/Run
Sep 24, 2023
HRCA Oktoberfest 5K
Sep 14, 2024
Flyin' Lion 5K
Sep 15, 2024
Miles 4 Madison 5K
Sep 21, 2024
Arvada, CO
Lisa Nelson's Mustang Stampede
Sep 16, 2023
Forge 5K
Sep 30, 2023
Run With The Wolves
Sep 29, 2024
Boulder, CO
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
Boulderthon: Downtown Boulder Marathon
Sep 29, 2024
Brighton, CO
Adams Half & 5K
Sep 17, 2023
Lafayette, CO
Waneka Classic
Sep 9, 2023
Lone Tree, CO
For a City 5K
Sep 16, 2023
Morrison, CO
RRCC Front Nine 5K
Sep 15, 2024
Wheat Ridge, CO
Farmers 5000
Sep 15, 2024
Greenwood Village, CO
Selian 5K
Sep 16, 2023
Lakewood, CO
Bark & Brew 5K
Sep 9, 2023
Tiger Prowl
Sep 10, 2023
Commerce City, CO
Night Nation Run - Denver
Sep 28, 2024
Monument, CO
Run4Hope 5K for Schools
Sep 21, 2024
Frederick, CO
Miner's Day 5K
Sep 16, 2023
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Labor Day Half Marathon
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Sep 2, 2024Monday
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13.1M, 10K, 5K run
More Information
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Parker, CO
15 miles point to pointDouglas County, CO
2. Blue Shoe Run for Prostate Cancer
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Sep 7, 2024Saturday
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5K run
More Information
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Denver, CO
8 miles point to pointDenver County, CO
3. Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race
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Sep 7, 2024Saturday
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26.2M, 13.1M run
More Information
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Denver, CO
8 miles point to pointDenver County, CO
4. South Boulder Creek parkrun
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Sep 7, 2024Saturday
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5K run
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Boulder, CO
31 miles point to pointBoulder County, CO
5. Denver Rocks Run 5K/10K
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Sep 8, 2024Sunday
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10K, 5K run
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Denver, CO
8 miles point to pointDenver County, CO
6. Honey Bee Hustle
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Sep 8, 2024Sunday
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1.5H run
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Loveland, CO
48 miles point to pointLarimer County, CO
7. RMRR Trophy Series - September
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Sep 8, 2024Sunday
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10M, 5K run
More Information
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Thornton, CO
12 miles point to pointAdams County, CO
8. Bark & Brew 5K
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Past DateSep 9, 2023Saturday
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5K run
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Lakewood, CO
13 miles point to pointJefferson County, CO
9. Waneka Classic
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Past DateSep 9, 2023Saturday
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5K run
More Information
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Lafayette, CO
23 miles point to pointBoulder County, CO
10. 9/11 Heroes Run - Denver
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Past DateSep 10, 2023Sunday
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5K run
More Information
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Denver, CO
8 miles point to pointDenver County, CO
11. RMRR Fall Marathon Training Series
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Past DateSep 10, 2023Sunday
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30K, 20K run
More Information
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Thornton, CO
12 miles point to pointAdams County, CO
12. Tiger Prowl
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Past DateSep 10, 2023Sunday
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5K run
More Information
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Lakewood, CO
13 miles point to pointJefferson County, CO
13. All-Out Fall Fest
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Sep 14, 2024Saturday
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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
13 miles point to pointAdams County, COJefferson County, CO
14. Colorado Brewery Running Series
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Sep 14, 2024Saturday
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5K run
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Denver, CO
8 miles point to pointDenver County, CO
15. Denver 5K
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Sep 14, 2024Saturday
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5K run
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Denver, CO
8 miles point to pointDenver County, CO
16. HRCA Oktoberfest 5K
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Sep 14, 2024Saturday
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5K run
More Information
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Littleton, CO
13 miles point to pointArapahoe County, CO
17. Jag Jog 5K
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Sep 14, 2024Saturday
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5K, 1M run
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Broomfield, CO
19 miles point to pointBroomfield County, CO
18. South Boulder Creek parkrun
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Sep 14, 2024Saturday
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5K run
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Boulder, CO
31 miles point to pointBoulder County, CO
19. Colorado Brewery Running Series
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Sep 15, 2024Sunday
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5K run
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Longmont, CO
33 miles point to pointBoulder County, CO
20. Farmers 5000
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Sep 15, 2024Sunday
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5K run
Virtual OptionMore Information
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Wheat Ridge, CO
13 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.