April Classic Races within 50 miles of Parker, CO
Denver, CO
RMRR Trophy Series - April
Apr 7, 2024
Donut Dash 5K
Apr 6, 2025
Three Creeks Half Marathon
Apr 13, 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 7, 2025
8 more
Rattler Trail Race
Apr 19, 2025
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 26, 2025
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Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Nielson Two Mile Challenge
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Apr 5, 2025Saturday
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2M trail run
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Colorado Springs, CO
47 miles point to pointEl Paso County, CO
2. South Boulder Creek parkrun
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Apr 5, 2025Saturday
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5K run
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Boulder, CO
44 miles point to pointBoulder County, CO
3. Donut Dash 5K
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Apr 6, 2025Sunday
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5K run
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Denver, CO
19 miles point to pointDenver County, CO
4. Raptor Run
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Past DateApr 6, 2024Saturday
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5K run
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Brighton, CO
32 miles point to pointAdams County, CO
5. RMRR Trophy Series - April
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Past DateApr 7, 2024Sunday
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4M run
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Denver, CO
19 miles point to pointDenver County, CO
6. South Boulder Creek parkrun
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Apr 12, 2025Saturday
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5K run
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Boulder, CO
44 miles point to pointBoulder County, CO
7. 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
44 miles point to pointBoulder County, CO
8. 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
15 miles point to pointArapahoe County, CO
9. 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
26 miles point to pointJefferson County, CO
10. The Diabetes Link at CU 5K Run/Walk
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Past DateApr 13, 2024Saturday
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5K run
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Boulder, CO
44 miles point to pointBoulder County, CO
11. Three Creeks Half Marathon
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Apr 13, 2025Sunday
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13.1M run
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Denver, CO
19 miles point to pointDenver County, CO
12. 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
47 miles point to pointEl Paso County, CO
13. 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
48 miles point to pointBoulder County, CO
14. 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
26 miles point to pointAdams County, COJefferson County, CO
15. Rattler Trail Race
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Apr 19, 2025Saturday
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50K, 25K, 10K trail run
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Colorado Springs, CO
47 miles point to pointEl Paso County, CO
16. 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
44 miles point to pointBoulder County, CO
17. Five Star Fun Run and 5K
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Past DateApr 20, 2024Saturday
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5K, 1M run
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Brighton, CO
32 miles point to pointAdams County, CO
18. The Mile High 4.20K
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TentativeApr 20, 2025Sunday
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4.2K run
Virtual OptionMore Information
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Denver, CO
19 miles point to pointDenver County, CO
19. Time Travel Half Marathon
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Past DateApr 20, 2024Saturday
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13.1M, 10K, 5K run
More Information
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Westminster, CO
26 miles point to pointAdams County, COJefferson County, CO
20. Unicorn 5K
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Apr 20, 2025Sunday
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5K run
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Denver, CO
19 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.