Carbon Valley Half Marathon
Race Date
May 9, 2026
Location
Firestone, CO
Quick facts
- Date
- Saturday, May 9, 2026
- Location
- Firestone, Colorado
- Distance
- Half marathon (13.1 mi) + 5K
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
- Finishers on record
- 1,751
The Experience
The Carbon Valley Half Marathon & 5K is an annual event benefiting autism awareness and Children's Hospital Colorado. Held in Frederick, Colorado, the half marathon course features local wood carvings, historic coal mining areas, and scenic views at Milavec Lake Park. The event includes a 5K, team challenge relay, and fun run, with a welcoming atmosphere and strong community support.
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Rolling Hills
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
Standout7112 years running
~135 finishers a year
shrinking
30% returning runners
2 timing sources · 8 photos
runners from 1 state
winner 1:12:28
typical high 67°F
Race Day Weather
5-year historical avgStart (Low)
42°
Afternoon (High)
67°
Pleasant conditions — light layers at start, comfortable by finish
0.2"
Precipitation
14 mph
Wind
57%
Humidity
Historical Finish Times
How 1,751 finishers actually crossed the line across 12 years.
Most recent
2026
Total finishers
1,751
Median time
2:07:57
Latest turnout
135
States
20
Turnout by year
2017–2026
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Carbon Valley Half Marathon?
The Carbon Valley Half Marathon is held on Saturday, May 9, 2026.
Where does the Carbon Valley Half Marathon take place?
It takes place in Firestone, Colorado.
What distances does the Carbon Valley Half Marathon offer?
The half marathon (13.1 miles), plus 5K.
Is the Carbon Valley Half Marathon course flat and good for a PR?
The Carbon Valley Half Marathon is a rolling hills, loop course course.
How many people run the Carbon Valley Half Marathon?
HalfRuns has finish records for 1,751 runners who have completed the Carbon Valley Half Marathon.
HalfRuns editorial — independent, no paid placement.
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