October Races within 400 miles of Thornton, CO on Sundays
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. Hot Chocolate 15K/5K - Denver
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Oct 5, 2025Sunday
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15K, 5K run
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Denver, CO
9 miles point to pointDenver County, CO
2. Run Crazy Horse
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Oct 5, 2025Sunday
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26.2M, 13.1M run | 26.2M relay
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Boston Marathon Qualifier
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Crazy Horse, SD
282 miles point to pointCuster County, SD
3. Great Balloon Chase
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Past DateOct 6, 2024Sunday
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13.1M, 10K, 5K run
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Albuquerque, NM
342 miles point to pointBernalillo County, NM
4. Healthy Kids Running Series - Denver
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Past DateOct 6, 2024Sunday
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kids run
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Denver, CO
9 miles point to pointDenver County, CO
5. Healthy Kids Running Series - Erie
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Past DateOct 6, 2024Sunday
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kids run
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Erie, CO
13 miles point to pointWeld County, CO
6. Healthy Kids Running Series
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Past DateOct 6, 2024Sunday
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kids run
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Trinidad, CO
189 miles point to pointLas Animas County, CO
7. Michael J. Fox Foundation Run
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Past DateOct 6, 2024Sunday
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5K run
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Denver, CO
9 miles point to pointDenver County, CO
8. Pikes Peak Road Runners Fall Series
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Past DateOct 6, 2024Sunday
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3.1M trail run
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Colorado Springs, CO
72 miles point to pointEl Paso County, CO
9. Pikes Peak Road Runners Kids Fall Series
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Past DateOct 6, 2024Sunday
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kids run
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Colorado Springs, CO
72 miles point to pointEl Paso County, CO
10. Pumpkin Run
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Past DateOct 6, 2024Sunday
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5K run
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Farmington, NM
277 miles point to pointSan Juan County, NM
11. RMRR Trophy Series - October
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Past DateOct 6, 2024Sunday
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12K, 5K run
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Aurora, CO
12 miles point to pointArapahoe County, CO
12. Sandia Mountain Shadows Trail Run
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Past DateOct 6, 2024Sunday
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10K, 5K trail run
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Albuquerque, NM
342 miles point to pointBernalillo County, NM
13. SHAP Zombie Run/Walk
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Past DateOct 6, 2024Sunday
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3K run | kids run
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Santa Fe, NM
293 miles point to pointSanta Fe County, NM
14. Strides for Sierra 5K
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Past DateOct 6, 2024Sunday
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5K, 1K run
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Arvada, CO
7 miles point to pointJefferson County, CO
15. Windsor Marathon
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Past DateOct 6, 2024Sunday
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26.2M, 13.1M, 10K, 5K run | kids run
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Windsor, CO
42 miles point to pointWeld County, CO
16. EDT XC Showdown
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Oct 12, 2025Sunday
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4K, 3K, 2K run
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Aurora, CO
12 miles point to pointArapahoe County, CO
17. Westy Half & 5K
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Oct 12, 2025Sunday
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13.1M, 5K run
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Westminster, CO
4 miles point to pointAdams County, COJefferson County, CO
18. Balloon Run
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Past DateOct 13, 2024Sunday
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10M, 5K run
Virtual OptionMore Information
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Albuquerque, NM
342 miles point to pointBernalillo County, NM
19. Big Tesuque Trail Run
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Past DateOct 13, 2024Sunday
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12M trail run
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Santa Fe, NM
293 miles point to pointSanta Fe County, NM
20. bRUNch Run
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Past DateOct 13, 2024Sunday
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10K, 5K run | kids run
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Denver, CO
9 miles point to pointDenver 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.