April Classic Races within 50 miles of Berthoud, CO
Longmont, CO
Boulder Track Series Meet 1
Apr 14, 2024
Colorado Brewery Running Series
Apr 21, 2024
Boulder Track Series Meet 2
Apr 28, 2024
Denver, CO
RMRR Trophy Series - April
Apr 7, 2024
Three Creeks Half Marathon
Apr 7, 2024
Healthy Kids Running Series
Apr 14, 2024
Apr 21, 2024
May 5, 2024
May 19, 2024
1 more
The Mile High 4.20K
Apr 21, 2024
Unicorn 5K
Apr 21, 2024
Fight for Air Climb
Apr 27, 2024
Donut Dash 5K
Apr 6, 2025
Aurora, CO
Aurora Polar Plunge and 5K
Apr 6, 2024
Healthy Kids Running Series
Apr 14, 2024
Apr 21, 2024
Apr 28, 2024
May 19, 2024
1 more
Loveland, CO
Run the Ranch
Apr 5, 2024
Apr 6, 2024
Earth Day 5K/10K
Apr 20, 2024
NOCO Half Marathon & 10K
Apr 27, 2024
Arvada, CO
Spring Fling Prairie Dog Half
Apr 14, 2024
Boulder, CO
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 6, 2024
Apr 13, 2024
48 more
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
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
Fort Collins, CO
Horsetooth Half Marathon
Apr 14, 2024
Healthy Kids Running Series
Apr 27, 2024
May 4, 2024
May 18, 2024
Apr 20, 2024
1 more
Flying Pig 5K
Apr 28, 2024
Severance, CO
Great Western Trail Race
Apr 20, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Run the Ranch
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Past DateApr 5, 2024Friday
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10K, 5K trail run
More Information
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Loveland, CO
6 miles point to pointLarimer County, CO
2. Aurora Polar Plunge and 5K
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Past DateApr 6, 2024Saturday
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5K run
More Information
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Aurora, CO
42 miles point to pointArapahoe County, CO
3. Donut Dash 5K
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Apr 6, 2025Sunday
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5K run
More Information
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Denver, CO
39 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
26 miles point to pointAdams County, CO
5. Run the Ranch
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Past DateApr 6, 2024Saturday
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12H, 6H, 4H trail run | 12H relay
More Information
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Loveland, CO
6 miles point to pointLarimer County, CO
6. South Boulder Creek parkrun
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Past DateApr 6, 2024Saturday
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5K run
More Information
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Boulder, CO
23 miles point to pointBoulder 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
39 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
39 miles point to pointDenver County, CO
9. All-Out Beat the Heat
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Past DateApr 13, 2024Saturday
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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
32 miles point to pointAdams County, COJefferson County, CO
10. Boulder Rez Half
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Past DateApr 13, 2024Saturday
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13.1M, 10K, 5K run
More Information
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Boulder, CO
23 miles point to pointBoulder County, CO
11. South Boulder Creek parkrun
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Past DateApr 13, 2024Saturday
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5K run
More Information
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Boulder, CO
23 miles point to pointBoulder County, CO
12. 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
23 miles point to pointBoulder County, CO
13. Boulder Track Series Meet 1
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Past DateApr 14, 2024Sunday
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track meet
More Information
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Longmont, CO
10 miles point to pointBoulder County, CO
14. Healthy Kids Running Series - Denver
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Past DateApr 14, 2024Sunday
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kids run
More Information
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Denver, CO
39 miles point to pointDenver County, CO
15. Healthy Kids Running Series - Aurora
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Past DateApr 14, 2024Sunday
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kids run
More Information
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Aurora, CO
42 miles point to pointArapahoe County, CO
16. Horsetooth Half Marathon
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Past DateApr 14, 2024Sunday
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13.1M run
More Information
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Fort Collins, CO
19 miles point to pointLarimer County, CO
17. Platte River Half Marathon
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Past DateApr 14, 2024Sunday
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13.1M run | 13.1M relay
More Information
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Littleton, CO
48 miles point to pointArapahoe County, CO
18. Spring Fling Prairie Dog Half
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Past DateApr 14, 2024Sunday
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13.1M, 10K, 5K run | kids run
More Information
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Arvada, CO
35 miles point to pointJefferson County, CO
19. Earth Day 5K/10K
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Apr 20, 2024Saturday
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10K, 5K run | kids run
More Information
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Loveland, CO
6 miles point to pointLarimer County, CO
20. Five Star Fun Run and 5K
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Apr 20, 2024Saturday
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5K, 1M run
More Information
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Brighton, CO
26 miles point to pointAdams 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.