April Races within 50 miles of Brighton, CO
Denver, CO
Barkin Dog Duathlon
Apr 22, 2023
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
Unicorn 5K
Apr 21, 2024
Fight for Air Climb
Apr 27, 2024
Donut Dash 5K
Apr 6, 2025
The Mile High 4.20K
Apr 20, 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
Castle Rock, CO
Rock Hawk Trail Races
Apr 27, 2024
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 13, 2025
Boulder, CO
Boulder Rez Half
Apr 13, 2024
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 13, 2024
48 more
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
Healthy Kids Running Series
Apr 27, 2024
May 4, 2024
May 18, 2024
Apr 20, 2024
1 more
Flying Pig 5K
Apr 28, 2024
Horsetooth Half Marathon
Apr 13, 2025
Severance, CO
Great Western Trail Race
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. 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
31 miles point to pointLarimer County, CO
2. 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
24 miles point to pointBoulder County, CO
3. 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
18 miles point to pointArapahoe County, CO
4. Donut Dash 5K
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Apr 6, 2025Sunday
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5K run
More Information
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Denver, CO
19 miles point to pointDenver County, CO
5. Raptor Run
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Past DateApr 6, 2024Saturday
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5K run
More Information
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Brighton, CO
Adams County, CO
6. 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
31 miles point to pointLarimer 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
19 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
19 miles point to pointDenver County, CO
9. 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
24 miles point to pointBoulder County, CO
10. Horsetooth Half Marathon
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Apr 13, 2025Sunday
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13.1M run
More Information
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Fort Collins, CO
44 miles point to pointLarimer 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
24 miles point to pointBoulder County, CO
12. Spring Fling Prairie Dog Half
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Apr 13, 2025Sunday
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13.1M, 10K, 5K run | kids run
More Information
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Arvada, CO
19 miles point to pointJefferson County, CO
13. 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
24 miles point to pointBoulder County, CO
14. 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
19 miles point to pointBoulder 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
18 miles point to pointArapahoe County, CO
16. 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
19 miles point to pointDenver 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
28 miles point to pointArapahoe County, CO
18. 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
16 miles point to pointAdams County, COJefferson County, CO
19. Earth Day 5K/10K
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Past DateApr 20, 2024Saturday
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10K, 5K run | kids run
More Information
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Loveland, CO
31 miles point to pointLarimer County, CO
20. Five Star Fun Run and 5K
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Past DateApr 20, 2024Saturday
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5K, 1M run
More Information
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Brighton, CO
Adams 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.