Upcoming Races in Boulder County, CO
Longmont, CO
Boulder Track Series Meet 2
Apr 28, 2024
Girls on the Run 5K
May 11, 2024
Frank Shorter Track Classic
May 12, 2024
Longmont Half & 5k
Jul 4, 2024
Roger's River Run
Jul 12, 2024
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
Colorado Brewery Running Series
Sep 15, 2024
Oktoberfest Sprint Triathlon
Sep 22, 2024
Colorado Brewery Running Series
Dec 7, 2024
Louisville, CO
Colorado 13er
Jun 2, 2024
Let Freedom Run
Jul 4, 2024
Louisville Trail Race
Sep 28, 2024
The Pretzel Run Colorado
Oct 12, 2024
MonsterDash Run
Oct 27, 2024
Louisville Turkey Trot
Nov 28, 2024
Santa Claus Runs
Dec 14, 2024
Arctic Prairie Dog Half
Jan 19, 2025
Boulder, CO
South Boulder Creek parkrun
Mar 22, 2025
Mar 29, 2025
Apr 5, 2025
Apr 13, 2024
48 more
Dash & Dine 5K Series
Apr 30, 2024
May 7, 2024
May 14, 2024
May 21, 2024
Boulder Mothers Day Run
May 12, 2024
BOLDERBoulder 10K
May 27, 2024
Boulder Stroke & Stride Series
May 30, 2024
Jun 5, 2024
Jun 13, 2024
Jun 20, 2024
5 more
Colorado Triathlon
Jun 1, 2024
BRR All Comers Summer Track and Field Series
Jun 6, 2024
Jun 20, 2024
Jul 18, 2024
Aug 1, 2024
Ironman 70.3 Boulder
Jun 8, 2024
Boulder Sunrise 10K and 5K
Jun 23, 2024
Boulder Sunrise Triathlon
Jun 23, 2024
Buffs4Life Kyle MacIntosh Memorial Fun Run
Jun 23, 2024
Sunset Trail Running Festival
Jun 23, 2024
Colorado Brewery Running Series
Jun 30, 2024
Avery Brewing Company Four on the Fourth 4K
Jul 4, 2024
Boulder Peak Triathlon
Jul 14, 2024
Tri Boulder
Jul 20, 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
Harvest Moon Long Course Triathlon
Sep 7, 2024
Boulderthon: Downtown Boulder Marathon
Sep 29, 2024
Alpine Bank Boulder Thanksgiving Day 5K
Nov 28, 2024
ColderBOLDER
Dec 7, 2024
Lucky Leprechaun 5K
Mar 16, 2025
Lafayette, CO
Colorado Brewery Running Series
May 18, 2024
Allenspark, CO
Run Like the Wind
Aug 31, 2024
Eldorado Springs, CO
Eldorado Springs Run for the Cure
Aug 15, 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. South Boulder Creek parkrun
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Apr 27, 2024Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
2. Boulder Track Series Meet 2
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Apr 28, 2024Sunday
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track meet
More Information
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Longmont, CO
Boulder County, CO
3. Dash & Dine 5K Series
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Apr 30, 2024Tuesday
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5K run
More Information
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Boulder, CO
Boulder County, CO
4. South Boulder Creek parkrun
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May 4, 2024Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
5. Dash & Dine 5K Series
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May 7, 2024Tuesday
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5K run
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Boulder, CO
Boulder County, CO
6. Girls on the Run 5K
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May 11, 2024Saturday
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5K run
More Information
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Longmont, CO
Boulder County, CO
7. South Boulder Creek parkrun
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May 11, 2024Saturday
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5K run
More Information
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Boulder, CO
Boulder County, CO
8. Boulder Mothers Day Run
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May 12, 2024Sunday
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13.1M, 10K, 5K trail run
More Information
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Boulder, CO
Boulder County, CO
9. Frank Shorter Track Classic
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May 12, 2024Sunday
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track meet
More Information
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Longmont, CO
Boulder County, CO
10. Dash & Dine 5K Series
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May 14, 2024Tuesday
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5K run
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Boulder, CO
Boulder County, CO
11. Colorado Brewery Running Series
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May 18, 2024Saturday
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5K run
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Lafayette, CO
Boulder County, CO
12. South Boulder Creek parkrun
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May 18, 2024Saturday
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5K run
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Boulder, CO
Boulder County, CO
13. Dash & Dine 5K Series
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May 21, 2024Tuesday
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5K run
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Boulder, CO
Boulder County, CO
14. South Boulder Creek parkrun
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May 25, 2024Saturday
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5K run
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Boulder, CO
Boulder County, CO
15. BOLDERBoulder 10K
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May 27, 2024Monday
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10K run
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Boulder, CO
Boulder County, CO
16. Boulder Stroke & Stride Series
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May 30, 2024Thursday
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aquathon | 5K run
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Boulder, CO
Boulder County, CO
17. Colorado Triathlon
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Jun 1, 2024Saturday
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olympic, sprint triathlon | olympic duathlon
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Boulder, CO
Boulder County, CO
18. South Boulder Creek parkrun
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Jun 1, 2024Saturday
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5K run
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Boulder, CO
Boulder County, CO
19. Colorado 13er
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Jun 2, 2024Sunday
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13.1M, 10K, 5K run
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Louisville, CO
Boulder County, CO
20. Boulder Stroke & Stride Series
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Jun 5, 2024Wednesday
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aquathon | 5K run
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Boulder, CO
Boulder 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.