August Races in Colorado on Saturdays
Evergreen, CO
Staunton State Park 20K
Aug 3, 2024
Longmont, CO
Sunrise Stampede 5K
Aug 10, 2024
Longmont Kids Only Triathlon
Aug 24, 2024
Longmont Try-a-Tri
Aug 24, 2024
Greeley, CO
Frontier Academy Community 5K
Aug 24, 2024
Denver, CO
D'Evelyn Dash
Aug 26, 2023
Festival For Life: AIDS Walk & Run Colorado
Aug 26, 2023
Impact Uganda 5K/10K
Aug 17, 2024
Miles for Migraine
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
Continental Divide Trail Run
Aug 24, 2024
Centennial, CO
Arapahoe Warrior 5K
Aug 3, 2024
Westminster, CO
Holy Cow Trail Stampede
Aug 10, 2024
Jog in the Bog 5K
Aug 24, 2024
Westminster Trail Race
Aug 24, 2024
Winter Park, CO
Byers Peak Stampede
Aug 24, 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
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 Rez Marathon
Aug 3, 2024
Pearl Street Mile
Aug 3, 2024
Boulder Sunset 10K/5K
Aug 24, 2024
Boulder Sunset Triathlon
Aug 24, 2024
Leadville, CO
Leadville Trail 100 Mile Run
Aug 17, 2024
Fairplay, CO
Sheep Mountain Trail Runs
Aug 3, 2024
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
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
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
Human Race
Aug 10, 2024
New Castle, CO
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. 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
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. 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
15. South Boulder Creek parkrun
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Aug 3, 2024Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
16. Staunton State Park 20K
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Aug 3, 2024Saturday
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20K trail run
More Information
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Evergreen, CO
Jefferson County, CO
17. Unicorn 5K South
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Aug 3, 2024Saturday
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5K run
More Information
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Highlands Ranch, CO
Douglas County, CO
18. Aspen Backcountry Marathon
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Past DateAug 5, 2023Saturday
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26.2M, 13.1M trail run
More Information
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Aspen, CO
Pitkin County, CO
19. Sertoma HEARS 5K
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Past DateAug 5, 2023Saturday
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5K run
More Information
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Colorado Springs, CO
El Paso County, CO
20. Aspen parkrun
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Aug 10, 2024Saturday
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5K run
More Information
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Aspen, CO
Pitkin 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.