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Carbon Valley Half Marathon

Race Date

May 9, 2026

Location

Firestone, CO

Standout71

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.

Logistics

Race Day

Saturday, May 9, 2026

Start Time

TBA

Start Location

Firestone, CO

Directions

Course Info

Course Type

Loop Course

Terrain

road

Difficulty

Rolling Hills

Net Drop/km

0 m (Flat)

Separation

0.0%

Also Offers

5K

Quality Score

Standout71
Methodology
Heritage20/20

12 years running

Size11/15

~135 finishers a year

Momentum4/5

shrinking

Loyalty20/20

30% returning runners

Course & details6/15

2 timing sources · 8 photos

National draw0/10

runners from 1 state

Front-pack speed5/5

winner 1:12:28

Weather5/10

typical high 67°F

Race Day Weather

5-year historical avg

Start (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

10%
25%
75%
90%
1:10p50 median ≈ 2:104:05

Turnout by year

20172026

'17'18'19'21'22'24'25'26
See full results

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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