2026 Boulderthon Half Marathon
Race Date
Sep 27, 2026
Location
Boulder, CO
Quick facts
- Date
- Sunday, September 27, 2026
- Location
- Boulder, Colorado
- Distance
- Half marathon (13.1 mi)
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
The Experience
Currency:
$ USD (US Dollars)
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Boulderthon | Sept. 28, 2025 (https://www.brooksee.com/bld)
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Gender
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Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Rolling Hills
Quality Score
Solid Pick486 years running
~3,562 finishers a year
growing or steady
11% returning runners
limited extras
runners from 1 state
winner 1:06:31
typical high 77°F
Race Day Weather
5-year historical avgStart (Low)
48°
Afternoon (High)
77°
Warm — hydration strategy is key, start conservatively
0.0"
Precipitation
9 mph
Wind
47%
Humidity
Frequently asked
When is the 2026 Boulderthon Half Marathon?
The 2026 Boulderthon Half Marathon is held on Sunday, September 27, 2026.
Where does the 2026 Boulderthon Half Marathon take place?
It takes place in Boulder, Colorado.
What distances does the 2026 Boulderthon Half Marathon offer?
The half marathon (13.1 miles).
Is the 2026 Boulderthon Half Marathon course flat and good for a PR?
The 2026 Boulderthon Half Marathon is a rolling hills, loop course course.
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