Half Marathons within 50 miles of Littleton, CO
Featured Listing
1. Boulderthon: Downtown Boulder Marathon
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Sep 28, 2025Sunday
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26.2M, 13.1M, 10K, 5K run | kids run
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Boulder, CO
Boulder County, CO
1. Boulder Rez Half
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Past DateApr 13, 2024Saturday
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13.1M, 10K, 5K run
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Boulder, CO
31 miles point to pointBoulder County, CO
2. Time Travel Half Marathon
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Past DateApr 20, 2024Saturday
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13.1M, 10K, 5K run
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Westminster, CO
15 miles point to pointAdams County, COJefferson County, CO
3. Blue Heron Half and 5K
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Past DateApr 21, 2024Sunday
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13.1M, 5K run
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Brighton, CO
28 miles point to pointAdams County, CO
4. Carbon Valley Half Marathon
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Past DateMay 11, 2024Saturday
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13.1M, 5K, 1M run | 13.1M relay | kids run
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Firestone, CO
35 miles point to pointWeld County, CO
5. Latino Ultra Nature Adventure
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Past DateJun 1, 2024Saturday
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50K, 13.1M, 7.5M, 5K run
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Golden, CO
14 miles point to pointJefferson County, CO
6. REVEL Rockies
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Past DateJun 1, 2024Saturday
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26.2M, 13.1M run
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Boston Marathon Qualifier
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Denver, CO
9 miles point to pointDenver County, CO
7. Slacker Half Marathon
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Past DateJun 22, 2024Saturday
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13.1M, 4M run | 13.1M relay
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Georgetown, CO
37 miles point to pointClear Creek County, CO
8. Boulder Rez Marathon
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Past DateAug 3, 2024Saturday
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26.2M, 19.7M, 13.1M, 10K run | 26.2M relay
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Boulder, CO
31 miles point to pointBoulder County, CO
9. I'm Bound for Boston Marathon & Half Marathon - Denver
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Past DateAug 4, 2024Sunday
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26.2M, 13.1M run
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Denver, CO
9 miles point to pointDenver County, CO
10. Georgetown to Idaho Springs Half Marathon
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Past DateAug 10, 2024Saturday
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13.1M run
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startGeorgetown, CO37 miles point to pointfinishIdaho Springs, CO28 miles point to pointClear Creek County, COClear Creek County, CO
11. Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race
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Past DateSep 7, 2024Saturday
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26.2M, 13.1M run
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Denver, CO
9 miles point to pointDenver County, CO
12. All-Out Kooky-Spooky
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Oct 27, 2024Sunday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Golden, CO
14 miles point to pointJefferson County, CO
13. All-Out Fa La La
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Dec 7, 2024Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Westminster, CO
15 miles point to pointAdams County, COJefferson County, CO
14. All-Out Polar Prowl
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Jan 11, 2025Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Arvada, CO
13 miles point to pointJefferson County, CO
15. Arctic Prairie Dog Half - Westminster
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Jan 19, 2025Sunday
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13.1M, 10K, 5K run
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Louisville, CO
26 miles point to pointBoulder County, CO
16. Ralston Creek Half Marathon & 5k
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Feb 16, 2025Sunday
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13.1M, 5K run
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Arvada, CO
13 miles point to pointJefferson County, CO
17. All-Out Mardi Crawl
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Feb 22, 2025Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Arvada, CO
13 miles point to pointJefferson County, CO
18. Time to Paddy 5K/10K and Lucky 13.1
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Mar 1, 2025Saturday
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13.1M, 10K, 5K, 1M run | kids run
Virtual OptionMore Information
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Denver, CO
9 miles point to pointDenver County, CO
19. That Dam Run
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Mar 2, 2025Sunday
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13.1M, 10K, 5K run | kids run
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Cherry Creek State Park, CO
9 miles point to pointArapahoe County, CO
20. All-Out Spring Fever
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Mar 23, 2025Sunday
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13.1M, 10K, 5K run
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Golden, CO
14 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.