Colorado 13er Half Marathon

JUN
7
2026
A looped half marathon plus 10k and 5k in Louisville, Colorado, featuring crushed gravel sections, Flatirons views, chip timing, a performance tee for every runner, and a finisher medal for the half.
Sun 7 Jun 2026
13 miles 10 kilometers 5 kilometers

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Colorado 13er (Half Marathon/10k/5k)

The Colorado 13er is a looped set of road and trail races held in Louisville, Colorado. The course is designed to include views of the Flatirons and contains about nine miles of flat, crushed gravel. The half marathon course is described as scenic and spectator friendly.

Distances offered:

  • 13.1 miles (half marathon) : open to ages 14 and up
  • 10 km
  • 5 km

Race services and amenities include ten water station passes, five port-a-john passes, nearby free parking, iced towels at the finish, and gender-specific performance short-sleeved tees for all registrants. The half marathon awards a collector finisher medal to finishers. Timing is chip based with texted results and live, real-time results posted online.

The event partners with local charities. The listed charity partner is Community Food Share, and donations through the race portal support their food distribution work. The event also accepts gently used or new athletic shoe donations through a sneakers reuse program that benefits Growing Home. Group registration savings are noted for groups of five or more. Visit the organization's website for the most recent information.

13 mi
13.1 Miles
10 km
10k
5 km