April Races within 100 miles of Leadville, CO
Denver, CO
Barkin Dog Duathlon
Apr 22, 2023
RMRR Trophy Series - April
Apr 7, 2024
Three Creeks Half Marathon
Apr 7, 2024
Fight for Air Climb
Apr 27, 2024
Donut Dash 5K
Apr 6, 2025
The Mile High 4.20K
Apr 20, 2025
Unicorn 5K
Apr 20, 2025
Colorado Springs, CO
Tillman Honor Run
Apr 13, 2024
Time Travel Half Marathon
Apr 21, 2024
Alpine Autism Center Run for the One 5K
Apr 27, 2024
Nielson Two Mile Challenge
Mar 1, 2025
Apr 5, 2025
May 3, 2025
Jun 1, 2024
8 more
Rattler Trail Race
Apr 19, 2025
Aurora, CO
Aurora Polar Plunge and 5K
Apr 6, 2024
Castle Rock, CO
Rock Hawk Trail Races
Apr 27, 2024
Arvada, CO
Spring Fling Prairie Dog Half
Apr 13, 2025
Boulder, CO
Boulder Rez Half
Apr 13, 2024
The Diabetes Link at CU 5K Run/Walk
Apr 13, 2024
Dash & Dine 5K Series
Apr 30, 2024
May 7, 2024
May 14, 2024
May 21, 2024
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
Brighton, CO
Raptor Run
Apr 6, 2024
Five Star Fun Run and 5K
Apr 20, 2024
Blue Heron Half and 5K
Apr 21, 2024
Runs With Scissors Races
Apr 27, 2024
Salida, CO
Spiral Drive Run
Apr 20, 2024
Canon City, CO
Royal Gorge Groove
Apr 20, 2024
Walk for Life/5K
Apr 20, 2024
Fountain, CO
Woody's Tortoise and Hare
Apr 20, 2024
Rifle, CO
Strut for Mutts
Apr 20, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
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.
1. Aspen parkrun
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Apr 5, 2025Saturday
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5K run
More Information
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Aspen, CO
28 miles point to pointPitkin County, CO
2. Nielson Two Mile Challenge
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Apr 5, 2025Saturday
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2M trail run
More Information
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Colorado Springs, CO
83 miles point to pointEl Paso County, CO
3. South Boulder Creek parkrun
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Apr 5, 2025Saturday
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5K run
More Information
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Boulder, CO
75 miles point to pointBoulder County, CO
4. Aurora Polar Plunge and 5K
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Past DateApr 6, 2024Saturday
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5K run
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Aurora, CO
84 miles point to pointArapahoe County, CO
5. Donut Dash 5K
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Apr 6, 2025Sunday
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5K run
More Information
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Denver, CO
77 miles point to pointDenver County, CO
6. Raptor Run
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Past DateApr 6, 2024Saturday
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5K run
More Information
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Brighton, CO
93 miles point to pointAdams County, CO
7. RMRR Trophy Series - April
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Past DateApr 7, 2024Sunday
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4M run
More Information
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Denver, CO
77 miles point to pointDenver County, CO
8. Three Creeks Half Marathon
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Past DateApr 7, 2024Sunday
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13.1M run
More Information
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Denver, CO
77 miles point to pointDenver County, CO
9. Aspen parkrun
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Apr 12, 2025Saturday
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5K run
More Information
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Aspen, CO
28 miles point to pointPitkin County, CO
10. South Boulder Creek parkrun
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Apr 12, 2025Saturday
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5K run
More Information
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Boulder, CO
75 miles point to pointBoulder County, CO
11. 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
75 miles point to pointBoulder County, CO
12. Platte River Half Marathon
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Apr 13, 2025Sunday
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13.1M run | 13.1M relay
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Littleton, CO
72 miles point to pointArapahoe County, CO
13. Spring Fling Prairie Dog Half
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Apr 13, 2025Sunday
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13.1M, 10K, 5K run | kids run
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Arvada, CO
75 miles point to pointJefferson County, CO
14. The Diabetes Link at CU 5K Run/Walk
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Past DateApr 13, 2024Saturday
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5K run
More Information
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Boulder, CO
75 miles point to pointBoulder County, CO
15. Tillman Honor Run
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Past DateApr 13, 2024Saturday
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4.2M run
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Colorado Springs, CO
83 miles point to pointEl Paso County, CO
16. Boulder Track Series Meet 1
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Past DateApr 14, 2024Sunday
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track meet
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Longmont, CO
89 miles point to pointBoulder County, CO
17. All-Out Beat the Heat
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Apr 19, 2025Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Boston Marathon Qualifier
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Westminster, CO
78 miles point to pointAdams County, COJefferson County, CO
18. Aspen parkrun
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Apr 19, 2025Saturday
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5K run
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Aspen, CO
28 miles point to pointPitkin County, CO
19. Rattler Trail Race
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Apr 19, 2025Saturday
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50K, 25K, 10K trail run
More Information
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Colorado Springs, CO
83 miles point to pointEl Paso County, CO
20. South Boulder Creek parkrun
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Apr 19, 2025Saturday
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5K run
More Information
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Boulder, CO
75 miles point to pointBoulder 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.