Clarence DeMar Marathon
The Clarence Demar Marathon offers a fast, scenic tour of Keene, New Hampshire, honoring a legendary runner.
Race Date
Sep 27, 2026
Location
Keene, NH
Quick facts
- Date
- Sunday, September 27, 2026
- Location
- Keene, New Hampshire
- Distance
- Half marathon (13.1 mi) + 26.2M
- Course
- Point to Point
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 3,532
Highlights
Good For
Atmosphere
Course
The Experience
The Clarence Demar Marathon in Keene, New Hampshire, is a tribute to the legendary runner who won the Boston Marathon seven times. First run in 2015, this event has grown into a beloved fixture, drawing approximately 343 finishers in recent years, with about 23% returning annually.
Runners from around 30 states make the journey to this New England gem. The course is USATF-certified and designed for speed, featuring a net drop and significant start/finish separation that hints at a point-to-point design, making it a potential PR course. While the official elevation gain and loss are minimal, the course is noted for its scenic qualities and fun atmosphere.
The race typically takes place in pleasant autumn conditions, with temperatures ranging from 52–68°F, creating an ideal environment for runners aiming for a fast time or simply enjoying the community spirit.
Race-provided description
Clarence DeMar Marathon and Half Marathon in Keene, NH. A scenic and fun race to run in New England.
Course Info
USATF CertifiedCourse Type
Point to Point
Terrain
road
Scenery
Small Town
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
+0.52 m
Separation
45.0%
Also Offers
USATF Certified Course
NH25007JK · 2025 Clarence Demar Half Marathon
Net downhill course — fast finishing times are common.
Quality Score
Runner Favorite8411 years running
~330 finishers a year
growing or steady
23% returning runners
USATF certified · 2 timing sources
runners from 30 states
winner 1:10:45
typical high 68°F
Race Day Weather
5-year historical avgStart (Low)
52°
Afternoon (High)
68°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
9 mph
Wind
80%
Humidity
Historical Finish Times
How 3,532 finishers actually crossed the line across 11 years.
Most recent
2025
Total finishers
3,532
Median time
2:09:18
Latest turnout
343
States
47
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Clarence DeMar Marathon?
The Clarence DeMar Marathon is held on Sunday, September 27, 2026.
Where does the Clarence DeMar Marathon take place?
It takes place in Keene, New Hampshire.
What distances does the Clarence DeMar Marathon offer?
The half marathon (13.1 miles), plus 26.2M.
Is the Clarence DeMar Marathon course flat and good for a PR?
The Clarence DeMar Marathon is a ultra-flat, point to point course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the Clarence DeMar Marathon?
HalfRuns has finish records for 3,532 runners who have completed the Clarence DeMar Marathon.
HalfRuns editorial — independent, no paid placement.
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