September Races in Colorado on Weekends
Event Category
Click Here to find out what Classic, Multisport, and Variety mean.
To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.
To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.
City Location
1. 10K at 10,000 Feet Trail Run
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Sep 1, 2024Sunday
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10K, 5K trail run
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Steamboat Springs, CO
Routt County, CO
2. Orangetheory 5K at Labor Day Lift Off
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Sep 1, 2024Sunday
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5K run
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Colorado Springs, CO
El Paso County, CO
3. Wine Run 5K at Holy Cross Abbey
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Sep 1, 2024Sunday
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5K run
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Canon City, CO
Fremont County, CO
4. Breck Crest Mountain Marathon
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Past DateSep 3, 2023Sunday
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23M, 13.1M, 10K trail run
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Breckenridge, CO
Summit County, CO
5. Calarat Challenge Trail Running Festival
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Past DateSep 3, 2023Sunday
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13.1M, 10K, 5K trail run | kids run
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Jamestown, CO
Boulder County, CO
6. Alberta Peak Challenge
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Sep 7, 2024Saturday
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12M, 4M trail run
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Pagosa Springs, CO
Archuleta County, CO
7. Aspen parkrun
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Sep 7, 2024Saturday
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5K run
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Aspen, CO
Pitkin County, CO
8. Black Squirrel Half Marathon
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Sep 7, 2024Saturday
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13.1M trail run
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Bellvue, CO
Larimer County, CO
9. Cirque Series - Arapahoe Basin
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Sep 7, 2024Saturday
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8.8M trail run
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Keystone, CO
Summit County, CO
10. Desert's Edge Triathlon
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Sep 7, 2024Saturday
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olympic, sprint triathlon | sprint offroad triathlon
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- -uknkown-, CO
11. Devil on the Divide
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Sep 7, 2024Saturday
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50K, 22K trail run
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Empire, CO
Clear Creek County, CO
12. Harvest Moon Long Course Triathlon
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Sep 7, 2024Saturday
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half triathlon | half duathlon
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Boulder, CO
Boulder County, CO
13. Imogene Pass Run
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Sep 7, 2024Saturday
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17.1M trail run
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startOuray, COfinishTelluride, COOuray County, COSan Miguel County, CO
14. Littlefoot Triathlon
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Sep 7, 2024Saturday
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sprint triathlon
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Lakewood, CO
Jefferson County, CO
15. Nielson Two Mile Challenge
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Sep 7, 2024Saturday
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2M trail run
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Colorado Springs, CO
El Paso County, CO
16. RexRun For PAWSitivity 5K Trail Run/Walk
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Sep 7, 2024Saturday
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5K trail run | kids run
Virtual OptionMore Information
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Aurora, CO
Arapahoe County, CO
17. SheSprints
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Sep 7, 2024Saturday
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sprint triathlon | sprint triathlon relay | sprint duathlon
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Women Only
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Aurora, CO
Arapahoe County, CO
18. 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
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Denver, CO
Denver County, CO
19. South Boulder Creek parkrun
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Sep 7, 2024Saturday
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5K run
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Boulder, CO
Boulder County, CO
20. Splashland Triathlon
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Sep 7, 2024Saturday
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sprint triathlon | sprint triathlon relay
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Alamosa, CO
Alamosa 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.