September Trail Runs in Colorado
Evergreen, CO
Bergen Peak Half Marathon
Sep 14, 2024
Glenwood Springs, CO
Sunlight Showdown
Sep 22, 2024
Crested Butte, CO
Crested Butte Ultra
Sep 28, 2024
Colorado Springs, CO
Nielson Two Mile Challenge
Mar 1, 2025
Apr 6, 2024
May 4, 2024
Jun 1, 2024
8 more
Durango, CO
Mountain Marmot Trail Run
Sep 23, 2023
Woodland Park, CO
Pony Express Run
Sep 22, 2024
Steamboat Springs, CO
10K at 10,000 Feet Trail Run
Sep 1, 2024
Run Rabbit Run
Sep 14, 2024
Sep 13, 2024
Emerald Mountain Trail Run
Sep 28, 2024
Buena Vista, CO
Trail Sisters Women's Half Marathon
Sep 14, 2024
West Line Winder
Sep 28, 2024
14er Fest Races
Sep 29, 2024
Winter Park, CO
Elevation Everest - The Half Everest
Sep 28, 2024
Manitou Springs, CO
Pikes Peak Ascent and Marathon
Sep 22, 2024 - Marathon
Sep 21, 2024 - Ascent
Louisville, CO
Louisville Trail Race
Sep 28, 2024
Nederland, CO
Ned Ned Run
Sep 9, 2023
Marble, CO
Lead King Loop Charity Race
Sep 15, 2024
Aspen, CO
Golden Leaf Half Marathon
Sep 28, 2024
Littleton, CO
HRCA Wildcat Mountain Trail Races
Sep 28, 2024
Copper Mountain, CO
Summit Up Trail Run
Sep 9, 2023
Breckenridge, CO
Breck Crest Mountain Marathon
Sep 3, 2023
Pagosa Springs, CO
Mountain Chile Cha Cha Trail Races
Sep 23, 2023
Alberta Peak Challenge
Sep 7, 2024
Ridgway, CO
John Wayne Grit Series
Sep 21, 2024
Bellvue, CO
Black Squirrel Half Marathon
Sep 7, 2024
Lakewood, CO
Lakewood Trail Series
Sep 4, 2024
Sep 11, 2024
Sep 18, 2024
Sep 25, 2024
Bear Chase Race - Half Marathon & 10K
Sep 29, 2024
Sep 28, 2024
Palmer Lake, CO
24 Hours of Palmer Lake
Sep 28, 2024
Beaver Creek, CO
The bRUNch Trail Run
Sep 17, 2023
Keystone, CO
Cirque Series - Arapahoe Basin
Sep 7, 2024
Empire, CO
Devil on the Divide
Sep 7, 2024
Minturn, CO
Meadowgold Trail Run
Sep 14, 2024
Nathrop, CO
Sawatch Ascent
Sep 29, 2024
Red Feather Lakes, CO
Red Feather Trail Jamboree
Sep 21, 2024
Sep 20, 2024
Sep 22, 2024
Jamestown, CO
Calarat Challenge Trail Running Festival
Sep 3, 2023
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
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. 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
3. 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
4. Lakewood Trail Series
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Sep 4, 2024Wednesday
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7M, 4M trail run
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Lakewood, CO
Jefferson County, CO
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. Ned Ned Run
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Past DateSep 9, 2023Saturday
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13.1M, 10K, 5K trail run
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Nederland, CO
Boulder County, CO
13. Summit Up Trail Run
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Past DateSep 9, 2023Saturday
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9K, 5K trail run
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Copper Mountain, CO
Summit County, CO
14. Lakewood Trail Series
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Sep 11, 2024Wednesday
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7M, 4M trail run
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Lakewood, CO
Jefferson County, CO
15. Arapahoe County 5K Trail Run
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Sep 12, 2024Thursday
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5K trail run
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- -uknkown-, CO
16. Run Rabbit Run
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Sep 13, 2024Friday
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100M trail run
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Steamboat Springs, CO
Routt County, CO
17. Bergen Peak Half Marathon
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Sep 14, 2024Saturday
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13.1M trail run
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Evergreen, CO
Jefferson County, CO
18. Meadowgold Trail Run
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Sep 14, 2024Saturday
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10K, 5K trail run
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Minturn, CO
Eagle County, CO
19. Run Rabbit Run
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Sep 14, 2024Saturday
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50M trail run
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Steamboat Springs, CO
Routt County, CO
20. Trail Sisters Women's Half Marathon
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Sep 14, 2024Saturday
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13.1M, 10K trail run
More Information
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Buena Vista, 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.