August Races in Colorado
Longmont, CO
Sunrise Stampede 5K
Aug 10, 2024
Outdoor Divas Sprint Triathlon
Aug 18, 2024
Longmont Kids Only Triathlon
Aug 24, 2024
Longmont Try-a-Tri
Aug 24, 2024
Denver, CO
Denver Twilight 5000 (Race 2)
Aug 10, 2023
Race for Research 5K
Aug 20, 2023
D'Evelyn Dash
Aug 26, 2023
Festival For Life: AIDS Walk & Run Colorado
Aug 26, 2023
PH in the Park
Aug 27, 2023
Impact Uganda 5K/10K
Aug 17, 2024
Donot Stop
Aug 31, 2024
Crested Butte, CO
Grand Traverse Mountain Run
Aug 31, 2024
Colorado Springs, CO
Sertoma HEARS 5K
Aug 5, 2023
Nielson Two Mile Challenge
Mar 1, 2025
Apr 6, 2024
May 4, 2024
Jun 1, 2024
8 more
Hometown Half Marathon
Aug 10, 2024
Protect the Children 5K
Aug 24, 2024
Donot Stop
Aug 31, 2024
Aurora, CO
Smoky Hill Community 5K
Aug 19, 2023
Run for the Ring 5K
Aug 3, 2024
WW Clyde Family Sports Day
Aug 10, 2024
Idaho Springs, CO
Georgetown to Idaho Springs Half Marathon
Aug 10, 2024
Georgetown, CO
Georgetown to Idaho Springs Half Marathon
Aug 10, 2024
Steamboat Springs, CO
Wild West Relay
Aug 2, 2024
Emerald Mountain Epic
Aug 4, 2024
Stagecoach Gravel Triathlon
Aug 4, 2024
Continental Divide Trail Run
Aug 24, 2024
Centennial, CO
NoSo November 5K Walk/Run
Aug 13, 2023
RMRR Trophy Series - August
Aug 2, 2024
Arapahoe Warrior 5K
Aug 3, 2024
Buena Vista, CO
TransRockies Run
Aug 12, 2024
Westminster, CO
Jog in the Bog 5K
Aug 19, 2023
Holy Cow Trail Stampede
Aug 10, 2024
Eye Love Logan and Zoe 5K
Aug 11, 2024
Hometown Half Marathon
Aug 11, 2024
Westminster Trail Race
Aug 24, 2024
Winter Park, CO
Byers Peak Stampede
Aug 24, 2024
Englewood, CO
Denver Twilight Series: The Finale
Aug 9, 2024
Erie, CO
Erie Half & 5K
Aug 18, 2024
Berthoud, CO
Berthoud Family Fun Run
Aug 19, 2023
Louisville, CO
Coyote Chase 5K
Aug 19, 2023
Castle Rock, CO
Reece's Roundup
Aug 3, 2024
Loveland, CO
Valley 5000
Aug 17, 2024
Aspen, CO
Aspen Backcountry Marathon
Aug 5, 2023
Aspen parkrun
Mar 22, 2025
Mar 29, 2025
Apr 6, 2024
Apr 13, 2024
48 more
Highlands Ranch, CO
Q Man Classic
Aug 12, 2023
ThunderRidge Grizzly 2 Mile
Aug 19, 2023
Unicorn 5K South
Aug 3, 2024
Littleton, CO
Cover Me 5K
Aug 27, 2023
HRCA Splash Mash Dash Kids Triathlon
Aug 3, 2024
Pancake Stampede 5K
Aug 11, 2024
Colorado 6 Dot Dash
Aug 24, 2024
Frisco, CO
Run the Rockies Trail Race
Aug 10, 2024
Estes Park, CO
Rocky Mountain Half Marathon
Aug 2, 2024
Aug 3, 2024
Boulder, CO
Transperfect Victory Lap 5K
Aug 19, 2023
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 6, 2024
Apr 13, 2024
48 more
Boulder Stroke & Stride Series
May 30, 2024
Jun 5, 2024
Jun 13, 2024
Jun 20, 2024
5 more
BRR All Comers Summer Track and Field Series
Jun 6, 2024
Jun 20, 2024
Jul 18, 2024
Aug 1, 2024
Boulder Rez Marathon
Aug 3, 2024
Pearl Street Mile
Aug 3, 2024
Rocky Mountain Tri Fest
Aug 11, 2024
Boulder Sunset 10K/5K
Aug 24, 2024
Boulder Sunset Triathlon
Aug 24, 2024
Fairplay, CO
Sheep Mountain Trail Runs
Aug 3, 2024
Lone Tree, CO
Bluffs 8K Trail Run
Aug 27, 2023
Pagosa Springs, CO
What'Sup Tri
Aug 19, 2023
Turkey Springs Showdown Trail Races
Aug 10, 2024
Allenspark, CO
Run Like the Wind
Aug 31, 2024
Ridgway, CO
Ridgway Log Hill Hustle 5K/10K
Aug 25, 2024
Wheat Ridge, CO
Colorado Brewery Running Series
Aug 17, 2024
Gunnison, CO
Gunni Hi Tri
Aug 24, 2024
Palisade, CO
Just Peachy 5K
Aug 19, 2023
Eldorado Springs, CO
Eldorado Springs Run for the Cure
Aug 15, 2024
Creede, CO
Creede Mountain Run
Aug 31, 2024
Rye, CO
Escape 5K Trail Run
Aug 19, 2023
Fort Collins, CO
Be a Hero 5K
Aug 19, 2023
Wild West Relay
Aug 2, 2024
Lory Summer Trail Series
Aug 6, 2024
Aug 27, 2024
Aug 20, 2024
Aug 13, 2024
Mountain Ave Mile
Aug 9, 2024
Human Race
Aug 10, 2024
New Castle, CO
New Castle Dirty Dozen Trail Running Race
Aug 2, 2024
Pyro's Push It Up Trail Run
Aug 10, 2024
Craig, CO
Flying Colors 5K
Aug 3, 2024
Severance, CO
Severance Days 5K
Aug 24, 2024
Cheyenne Mountain State Park, CO
The Cheyenne Mountain Run
Aug 17, 2024
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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. Boulder Stroke & Stride Series
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Aug 1, 2024Thursday
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aquathon | 5K run
More Information
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Boulder, CO
Boulder County, CO
2. BRR All Comers Summer Track and Field Series
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Aug 1, 2024Thursday
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track meet
More Information
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Boulder, CO
Boulder County, CO
3. New Castle Dirty Dozen Trail Running Race
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Aug 2, 2024Friday
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10K trail run
More Information
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New Castle, CO
Garfield County, CO
4. RMRR Trophy Series - August
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Aug 2, 2024Friday
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5K run
More Information
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Centennial, CO
Arapahoe County, CO
5. Rocky Mountain Half Marathon
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Aug 2, 2024Friday
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5K run
More Information
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Estes Park, CO
Larimer County, CO
6. Wild West Relay
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Aug 2, 2024Friday
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200M relay
More Information
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startFort Collins, COfinishSteamboat Springs, CORoutt County, COLarimer County, CO
7. All-Out Runapalooza
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Aug 3, 2024Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Arvada, CO
Jefferson County, CO
8. Arapahoe Warrior 5K
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Aug 3, 2024Saturday
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5K run
More Information
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Centennial, CO
Arapahoe County, CO
9. Aspen parkrun
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Aug 3, 2024Saturday
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5K run
More Information
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Aspen, CO
Pitkin County, CO
10. Berry Picker Trail Run
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Aug 3, 2024Saturday
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5K trail run
More Information
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Vail, CO
Eagle County, CO
11. Boulder Rez Marathon
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Aug 3, 2024Saturday
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26.2M, 19.7M, 13.1M, 10K run | 26.2M relay
More Information
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Boulder, CO
Boulder County, CO
12. Flying Colors 5K
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Aug 3, 2024Saturday
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5K run
More Information
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Craig, CO
Moffat County, CO
13. HRCA Splash Mash Dash Kids Triathlon
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Aug 3, 2024Saturday
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youth triathlon
More Information
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Littleton, CO
Arapahoe County, CO
14. Kennebec Mountain Run
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Aug 3, 2024Saturday
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15M run
More Information
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Durango, CO
La Plata County, CO
15. Nielson Two Mile Challenge
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Aug 3, 2024Saturday
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2M trail run
More Information
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Colorado Springs, CO
El Paso County, CO
16. Pearl Street Mile
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Aug 3, 2024Saturday
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1M run | kids run
More Information
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Boulder, CO
Boulder County, CO
17. Reece's Roundup
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Aug 3, 2024Saturday
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10K, 5K run
More Information
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Castle Rock, CO
Douglas County, CO
18. Rocky Mountain Half Marathon
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Aug 3, 2024Saturday
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13.1M run
More Information
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Estes Park, CO
Larimer County, CO
19. Run for the Ring 5K
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Aug 3, 2024Saturday
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5K run | kids run
More Information
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Aurora, CO
Arapahoe County, CO
20. Sheep Mountain Trail Runs
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Aug 3, 2024Saturday
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50M, 50K, 13.1M trail run
More Information
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Fairplay, CO
Park 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.