Carbon Valley Half Marathon

MAY
9
2026
A half marathon and 5K in Firestone, Colorado on mixed trails and roads with Rocky Mountain views. Runners receive shirts, medals, and goodie bags and are asked to raise funds for autism research.
Sat 9 May 2026
13 miles 5 kilometers

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Carbon Valley Half Marathon & 5K : Race overview

The Carbon Valley event in Firestone, Colorado includes a half marathon and shorter distance options on a mixed-surface course. The route passes through manicured trail systems, dirt paths, bridges, and rural roads, and includes Firestone Central Park, the Firestone Trail, Milevac Lake in Frederick, and parts of Frederick downtown. The course provides views of the Rockies and features a two mile downhill finish. The 13.1 mile route is a certified course.

Event location 6850 Tilbury Avenue, Firestone, CO 80504.

Participant items and limits Participants who registered at least seven days before the event receive a tech t-shirt, a medal, and a goodie bag. The first 500 combined Half and 5K registrants receive goodie bags. Fun Run participants receive a cotton t-shirt. A limited quantity of additional t-shirts may be available for purchase at the event. There are no refunds.

Fundraising Participants are asked to raise funds individually or as teams for autism research. The event goal is to raise $25,000 for the Autism Treatment Network through Children’s Hospital Colorado. Each participant is asked to raise a minimum of $25.

Distances and formats Visit the organization's website for the most recent information.

  • Half Marathon (13.1 miles)
  • 5K
  • 1 Mile Fun Run
  • Virtual Half Marathon
  • Virtual 5K
13 mi
Half Marathon
5 km
1 Mile Fun Run
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