August Races in Colorado
Evergreen, CO
Evergreen Town Race
Aug 4, 2024
Longmont, CO
Sunrise Stampede 5K
Aug 10, 2024
Dog Days of Summer
Aug 9, 2025
Outdoor Divas Sprint Triathlon
Aug 10, 2025
Greeley, CO
Frontier Academy Community 5K
Aug 24, 2024
Denver, CO
I'm Bound for Boston Marathon & Half Marathon - Denver
Aug 4, 2024
Impact Uganda 5K/10K
Aug 17, 2024
Miles for Migraine
Aug 17, 2024
Race for Research 5K
Aug 18, 2024
Ram Run
Aug 24, 2024
Crested Butte, CO
Grand Traverse Mountain Run
Aug 30, 2025
Colorado Springs, CO
Popsicle 5K/10K/Half - Colorado Springs
Aug 3, 2024
Sertoma HEARS 5K
Aug 3, 2024
Crossover for Change Fun Run
Aug 10, 2024
Protect the Children 5K
Aug 24, 2024
Run4One 4K with obstacles and .5 mile Kids Race
Aug 31, 2024
Nielson Two Mile Challenge
Mar 1, 2025
Apr 5, 2025
May 3, 2025
Jun 7, 2025
8 more
Summer Sizzler
Aug 17, 2025
Aurora, CO
Run for the Ring 5K
Aug 3, 2024
Average Joe Run 5K
Aug 11, 2024
Smoky Hill Community 5K
Aug 25, 2024
Idaho Springs, CO
Georgetown to Idaho Springs Half Marathon
Aug 10, 2024
Grand Junction, CO
Warrior Waterfront 5K
Aug 24, 2024
Georgetown, CO
Georgetown to Idaho Springs Half Marathon
Aug 10, 2024
Steamboat Springs, CO
Emerald Mountain Epic
Aug 4, 2024
Continental Divide Trail Run
Aug 24, 2024
Wild West Relay
Aug 1, 2025
Stagecoach Gravel Triathlon
Aug 3, 2025
Buena Vista, CO
TransRockies Run
Aug 4, 2025
Westminster, CO
Eye Love Logan and Zoe 5K
Aug 18, 2024
Jog in the Bog 5K
Aug 24, 2024
Westminster Trail Race
Aug 24, 2024
Holy Cow Trail Stampede
Aug 9, 2025
Summer Sizzler
Aug 16, 2025
Englewood, CO
Denver Twilight Series: The Finale
Aug 9, 2024
Erie, CO
Erie Half & 5K
Aug 17, 2025
Louisville, CO
Coyote Chase 5K
Aug 24, 2024
Castle Rock, CO
Reece's Roundup
Aug 3, 2024
Broomfield, CO
Jag Jog 5K
Aug 24, 2024
Highlands Ranch, CO
Q Man Classic
Aug 10, 2024
ThunderRidge Grizzly 2 Mile
Aug 17, 2024
Unicorn 5K South
Aug 2, 2025
Littleton, CO
HRCA Splash Mash Dash Kids Triathlon
Aug 3, 2024
Forever Family 5K
Aug 10, 2024
Pancake Stampede 5K
Aug 11, 2024
Colorado 6 Dot Dash
Aug 24, 2024
Frisco, CO
Run the Rockies Trail Race
Aug 10, 2024
Arvada, CO
All-Out Runapalooza
Aug 2, 2025
Estes Park, CO
Rocky Mountain Half Marathon
Aug 2, 2025
Boulder, CO
BRR All Comers Summer Track and Field Series
Jun 6, 2024
Jun 20, 2024
Jul 18, 2024
Aug 1, 2024
Mile High Mile
Aug 1, 2024
Pearl Street Mile
Aug 3, 2024
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 12, 2025
48 more
Boulder Stroke & Stride Series
Jun 5, 2025
Jun 11, 2025
Jun 19, 2025
Jun 26, 2025
5 more
Boulder Rez Marathon
Aug 2, 2025
Rocky Mountain Tri Fest
Aug 9, 2025
Boulder Sunset 10K/5K
Aug 23, 2025
Boulder Sunset Triathlon
Aug 23, 2025
Fairplay, CO
Sheep Mountain Trail Runs
Aug 2, 2025
Lone Tree, CO
Bluffs 8K Trail Run
Aug 25, 2024
Pagosa Springs, CO
Turkey Springs Showdown Trail Races
Aug 10, 2024
PLPOA Give it a tri - Mini Triathlon
Aug 24, 2024
Allenspark, CO
Run Like the Wind
Aug 31, 2024
Ridgway, CO
Ridgway Log Hill Hustle 5K/10K
Aug 25, 2024
Gunnison, CO
Gunni Hi Tri
Aug 24, 2024
Palisade, CO
Just Peachy
Aug 10, 2024
Eldorado Springs, CO
Eldorado Springs Run for the Cure
Aug 15, 2024
Greenwood Village, CO
Saint Catherine 5K
Aug 24, 2024
Selian 5K
Aug 24, 2024
We Run So They May Walk 5K
Aug 24, 2024
Fraser, CO
Byers Peak Stampede
Aug 24, 2024
Keystone, CO
Das Bier Burner 5K
Aug 31, 2024
Creede, CO
Creede Mountain Run
Aug 30, 2025
Rye, CO
Escape 5K Trail Run
Aug 17, 2024
Fort Collins, CO
Lory Summer Trail Series
Aug 6, 2024
Aug 27, 2024
Aug 20, 2024
Aug 13, 2024
Wild West Relay
Aug 1, 2025
Choice City Running Festival - Mountain Avenue Mile & Human Race
Aug 9, 2025
Aug 8, 2025
New Castle, CO
Pyro's Push It Up Trail Run
Aug 10, 2024
Craig, CO
Flying Colors 5K
Aug 3, 2024
Dolores, CO
Escalante Days 5K
Aug 10, 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. BRR All Comers Summer Track and Field Series
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Past DateAug 1, 2024Thursday
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track meet
More Information
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Boulder, CO
Boulder County, CO
2. Mile High Mile
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Past DateAug 1, 2024Thursday
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1M run
More Information
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Boulder, CO
Boulder County, CO
3. Wild West Relay
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Aug 1, 2025Friday
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200M relay
More Information
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startFort Collins, COfinishSteamboat Springs, CORoutt County, COLarimer County, CO
4. All-Out Runapalooza
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Aug 2, 2025Saturday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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Arvada, CO
Jefferson County, CO
5. Aspen parkrun
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Aug 2, 2025Saturday
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5K run
More Information
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Aspen, CO
Pitkin County, CO
6. Boulder Rez Marathon
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Aug 2, 2025Saturday
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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
7. Nielson Two Mile Challenge
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Aug 2, 2025Saturday
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2M trail run
More Information
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Colorado Springs, CO
El Paso County, CO
8. RMRR Trophy Series - August
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Past DateAug 2, 2024Friday
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5K run
More Information
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Centennial, CO
Arapahoe County, CO
9. Rocky Mountain Half Marathon
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Aug 2, 2025Saturday
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13.1M, 5K run
More Information
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Estes Park, CO
Larimer County, CO
10. Sheep Mountain Trail Runs
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Aug 2, 2025Saturday
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50M, 50K, 13.1M trail run
More Information
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Fairplay, CO
Park County, CO
11. South Boulder Creek parkrun
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Aug 2, 2025Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
12. Unicorn 5K South
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Aug 2, 2025Saturday
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5K run
More Information
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Highlands Ranch, CO
Douglas County, CO
13. Arapahoe Warrior 5K
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Past DateAug 3, 2024Saturday
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5K run
More Information
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Centennial, CO
Arapahoe County, CO
14. Berry Picker Trail Run
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Past DateAug 3, 2024Saturday
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5K trail run
More Information
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Vail, CO
Eagle County, CO
15. Flying Colors 5K
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Past DateAug 3, 2024Saturday
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5K run
More Information
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Craig, CO
Moffat County, CO
16. HRCA Splash Mash Dash Kids Triathlon
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Past DateAug 3, 2024Saturday
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youth triathlon
More Information
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Littleton, CO
Arapahoe County, CO
17. Kennebec Mountain Run
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Past DateAug 3, 2024Saturday
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15M run
More Information
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Durango, CO
La Plata County, CO
18. Pearl Street Mile
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Past DateAug 3, 2024Saturday
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1M run | kids run
More Information
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Boulder, CO
Boulder County, CO
19. Popsicle 5K/10K/Half - Colorado Springs
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Past DateAug 3, 2024Saturday
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13.1M, 10K, 5K run
More Information
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Colorado Springs, CO
El Paso County, CO
20. Reece's Roundup
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Past DateAug 3, 2024Saturday
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10K, 5K run
More Information
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Castle Rock, CO
Douglas 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.