Clarence DeMar Marathon
Keene, United States of America · Monday 27 September 2027
The Clarence DeMar Marathon is a competitive road race established in 1978 to commemorate Clarence DeMar, a prominent marathoner who lived in Keene, New Hampshire. The event takes place annually in and around Keene, located in southwestern New Hampshire, and typically features both a full marathon and a half marathon. The marathon course is a point-to-point route that finishes on the campus of Keene State College.
Difficulty Calculator
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:m
:s
Adjusted Time
4:01:21
Time difference: +1.3 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain197m
Elevation High276m
Elevation Low144m
Weather Forecast
High17°C
Low13°C
Chance of Rain69%
How hard is Clarence DeMar Marathon?
Moderateharder than 48% of marathons
Flattest / easiestHardest
On our difficulty model, Clarence DeMar Marathon plays about 6 minutes slower than an average road marathon for a 3:30 runner. It ranks #593 hardest of 1151 marathons we analyse, and #316 of 576 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Clarence DeMar Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Clarence DeMar Marathon | Difference |
|---|---|---|
| 3:00:00 | 2:58:38 | −01:22 |
| 3:30:00 | 3:29:55 | −00:05 |
| 4:00:00 | 4:01:21 | +01:21 |
| 4:30:00 | 4:32:56 | +02:56 |
| 5:00:00 | 5:04:38 | +04:38 |
| 5:30:00 | 5:36:28 | +06:28 |
| 6:00:00 | 6:08:25 | +08:25 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Clarence DeMar Marathon 2027 Course Analysis
Clarence DeMar Marathon is a full marathon held in Keene, United States of America. It is scheduled for Monday 27 September 2027. The course is run on road surface with 197m of total climbing, with its high point near 276m above sea level. For registration and full race details, visit the official Clarence DeMar Marathon website.
Elevation Profile
With 197m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for September, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 13°C to 17°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (69%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Clarence DeMar Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Clarence DeMar Marathon against other marathons to find the right race for your goals.
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