September Ultras in Colorado on Weekends
City Location
1. The Day Quest - The Edge of Ultra - 26.3
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Past DateSep 1, 2024Sunday
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26.2M run | 26.3M trail run
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Boulder, CO
Boulder County, CO
2. Devil on the Divide
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Past DateSep 7, 2024Saturday
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50K, 22K trail run
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Empire, CO
Clear Creek County, CO
3. Run Rabbit Run
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Sep 13, 2025Saturday
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50M trail run
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Steamboat Springs, CO
Routt County, CO
4. Red Feather Trail Jamboree
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Past DateSep 21, 2024Saturday
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50M trail run
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Red Feather Lakes, CO
Larimer County, CO
5. Snow Mountain Ranch Trail Festival
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Past DateSep 21, 2024Saturday
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50K, 13.1M, 10K, 5K trail run | 26.2M relay
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Granby, CO
Grand County, CO
6. 24 Hours of Palmer Lake
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Sep 27, 2025Saturday
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24H trail run
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Palmer Lake, CO
El Paso County, CO
7. Bear Chase Race - Half Marathon & 10K
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Sep 27, 2025Saturday
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100K, 50M, 50K trail run
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Lakewood, CO
Jefferson County, CO
8. Crested Butte Ultra
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Sep 27, 2025Saturday
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50M, 55K, 35K trail run
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Crested Butte, CO
Gunnison County, CO
9. Sangre de Cristo Ultras
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Sep 27, 2025Saturday
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100M, 100K, 50M, 50K trail run
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Westcliffe, CO
Custer County, CO
10. West Line Winder
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Past DateSep 28, 2024Saturday
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50K, 30K trail run
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Buena Vista, CO
Chaffee County, CO
11. Sawatch Ascent
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Past DateSep 29, 2024Sunday
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50K trail run
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Nathrop, CO
Chaffee 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.