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Clarence DeMar Marathon

Keene, NH, USA

Partly cloudy throughout the day.

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Details
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Pre-Race
Race
Post-Race
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Race Overview

The Clarence DeMar Marathon offers a scenic 26.2-mile journey through New Hampshire's picturesque countryside, featuring gentle rolling hills and a net elevation drop that makes it a prime Boston Marathon qualifier. Runners are treated to stunning views of early autumn foliage, with the course culminating at the historic Appian Way of Keene State College, near where marathon legend Clarence DeMar once coached collegiate runners. The event is renowned for its exceptional organization and the enthusiastic support of over 300 volunteers, creating a welcoming atmosphere for participants of all levels.
Wikipedia

FAQ

When is the 2026 Clarence DeMar Marathon?

The 2026 Clarence DeMar Marathon will be held on Sunday September 27, 2026.

Is the Clarence DeMar Marathon a Boston Marathon Qualfier?

Yes, the Clarence DeMar Marathon is an official Boston Marathon qualifier.

Clarence DeMar Marathon Weather History

Clarence DeMar Marathon Weather Averages

Average Temp: 58°, Average Low: 49°, Average High: 71°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
51°
52°
54°
58°
62°
65°
68°
69°
Feel51°52°54°58°62°66°68°69°
Rain--------
Wind1mph
1mph
2mph
2mph
4mph
4mph
5mph
7mph
Dew49°49°50°52°52°52°51°52°
RunScoreRun Score: 7Run Score: 7Run Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 8

Clarence DeMar Marathon 2025

Sep 28, 2025
Clear conditions throughout the day.
Low: 57°, High: 84°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 57°
partly-cloudy-day 58°
partly-cloudy-day 61°
partly-cloudy-day 66°
clear-day 70°
clear-day 75°
clear-day 79°
clear-day 82°
Feel57°58°61°66°70°75°79°83°
Rain--------
Wind0mph
0mph
0mph
5mph
5mph
5mph
10mph
9mph
Dew57°58°60°62°63°63°61°61°
RunScoreRun Score: 8Run Score: 8Run Score: 8Run Score: 9Run Score: 8Run Score: 8Run Score: 7Run Score: 7

Clarence DeMar Marathon 2024

Sep 29, 2024
Partly cloudy throughout the day.
Low: 52°, High: 68°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 57°
cloudy 57°
cloudy 60°
cloudy 61°
cloudy 62°
cloudy 63°
cloudy 65°
partly-cloudy-day 66°
Feel57°57°60°61°62°63°65°66°
Rain--------
Wind0mph
3mph
0mph
3mph
0mph
3mph
0mph
0mph
Dew55°55°53°54°54°54°54°54°
RunScoreRun Score: 8Run Score: 9Run Score: 8Run Score: 9Run Score: 8Run Score: 9Run Score: 7Run Score: 7

Clarence DeMar Marathon 2023

Sep 24, 2023
Cloudy skies throughout the day with rain.
Low: 50°, High: 63°, Light Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 52°
cloudy 53°
cloudy 55°
cloudy 56°
cloudy 58°
cloudy 60°
cloudy 61°
cloudy 63°
Feel52°53°55°56°58°60°61°63°
Rain--------
Wind0mph
0mph
6mph
6mph
8mph
6mph
7mph
10mph
Dew50°51°50°50°49°51°51°52°
RunScoreRun Score: 8Run Score: 8Run Score: 9Run Score: 9Run Score: 9Run Score: 9Run Score: 9Run Score: 8

Clarence DeMar Marathon 2022

Sep 25, 2022
Partly cloudy throughout the day with late afternoon rain.
Low: 40°, High: 64°, Moderate Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
partly-cloudy-day 40°
cloudy 41°
partly-cloudy-day 45°
clear-day 49°
partly-cloudy-day 55°
cloudy 58°
partly-cloudy-day 61°
partly-cloudy-day 64°
Feel40°41°45°49°55°58°61°64°
Rain--------
Wind0mph
0mph
0mph
0mph
0mph
0mph
0mph
13mph
Dew40°41°44°48°49°50°52°51°
RunScoreRun Score: 7Run Score: 7Run Score: 7Run Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 7

Clarence DeMar Marathon 2021

Sep 26, 2021
Partly cloudy throughout the day.
Low: 49°, High: 68°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
partly-cloudy-day 55°
cloudy 53°
partly-cloudy-day 56°
partly-cloudy-day 60°
clear-day 66°
clear-day 67°
clear-day 68°
partly-cloudy-day 67°
Feel55°53°56°60°66°67°68°67°
Rain--------
Wind1mph
0mph
3mph
0mph
8mph
10mph
10mph
11mph
Dew54°53°54°54°52°46°41°44°
RunScoreRun Score: 8Run Score: 8Run Score: 9Run Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 8

Clarence DeMar Marathon 2019

Sep 29, 2019
Clearing in the afternoon.
Low: 46°, High: 67°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
partly-cloudy-day 61°
clear-day 61°
clear-day 62°
clear-day 64°
partly-cloudy-day 64°
clear-day 63°
clear-day 65°
clear-day 66°
Feel61°61°62°64°64°63°65°66°
Rain--------
Wind6mph
10mph
18mph
14mph
11mph
10mph
11mph
15mph
Dew54°53°49°48°47°44°42°41°
RunScoreRun Score: 9Run Score: 8Run Score: 6Run Score: 7Run Score: 8Run Score: 8Run Score: 8Run Score: 7

Clarence DeMar Marathon 2018

Sep 30, 2018
Partly cloudy throughout the day with morning rain.
Low: 42°, High: 64°, Light Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
rain 43°
fog 42°
cloudy 44°
cloudy 46°
partly-cloudy-day 53°
cloudy 58°
cloudy 60°
partly-cloudy-day 62°
Feel40°42°44°46°53°58°60°62°
Rainlight-------
Wind5mph
0mph
0mph
0mph
0mph
4mph
6mph
7mph
Dew43°42°44°46°47°47°44°44°
RunScoreRun Score: 7Run Score: 7Run Score: 7Run Score: 7Run Score: 8Run Score: 9Run Score: 9Run Score: 9

Clarence DeMar Marathon 2017

Sep 24, 2017
Clear conditions throughout the day.
Low: 55°, High: 94°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
clear-day 55°
clear-day 58°
clear-day 66°
clear-day 74°
clear-day 80°
clear-day 87°
clear-day 90°
clear-day 92°
Feel55°58°66°74°82°89°92°95°
Rain--------
Wind0mph
0mph
3mph
0mph
0mph
0mph
3mph
3mph
Dew54°57°61°65°64°66°66°67°
RunScoreRun Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 6Run Score: 5Run Score: 6Run Score: 5

Clarence DeMar Marathon 2016

Sep 25, 2016
Clearing in the afternoon.
Low: 36°, High: 62°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 36°
fog 36°
cloudy 40°
clear-day 47°
clear-day 54°
partly-cloudy-day 58°
clear-day 60°
partly-cloudy-day 61°
Feel36°36°40°47°54°58°60°61°
Rain--------
Wind0mph
0mph
0mph
1mph
8mph
8mph
16mph
18mph
Dew36°36°39°41°37°36°33°33°
RunScoreRun Score: 6Run Score: 6Run Score: 7Run Score: 8Run Score: 9Run Score: 9Run Score: 7Run Score: 7

Clarence DeMar Marathon 2015

Sep 27, 2015
Clearing in the afternoon.
Low: 34°, High: 70°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 34°
fog 36°
partly-cloudy-day 38°
clear-day 45°
clear-day 54°
clear-day 61°
clear-day 64°
clear-day 66°
Feel34°36°38°45°54°61°64°66°
Rain--------
Wind0mph
0mph
0mph
0mph
3mph
3mph
3mph
0mph
Dew29°30°34°38°43°43°37°39°
RunScoreRun Score: 6Run Score: 6Run Score: 7Run Score: 7Run Score: 9Run Score: 9Run Score: 9Run Score: 8

Clarence DeMar Marathon 2014

Sep 28, 2014
Clearing in the afternoon.
Low: 54°, High: 82°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 54°
fog 54°
fog 55°
cloudy 57°
clear-day 66°
clear-day 74°
clear-day 78°
clear-day 81°
Feel54°54°55°57°66°74°78°81°
Rain--------
Wind0mph
0mph
0mph
0mph
0mph
2mph
3mph
3mph
Dew47°47°48°49°54°56°57°58°
RunScoreRun Score: 8Run Score: 8Run Score: 8Run Score: 8Run Score: 7Run Score: 8Run Score: 8Run Score: 7

Clarence DeMar Marathon 2013

Sep 29, 2013
Partly cloudy throughout the day.
Low: 44°, High: 72°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 44°
fog 45°
cloudy 46°
partly-cloudy-day 50°
clear-day 59°
clear-day 65°
cloudy 68°
partly-cloudy-day 69°
Feel44°45°46°50°59°65°68°69°
Rain--------
Wind0mph
0mph
0mph
0mph
0mph
3mph
5mph
2mph
Dew39°41°43°46°48°51°48°47°
RunScoreRun Score: 7Run Score: 7Run Score: 7Run Score: 8Run Score: 8Run Score: 8Run Score: 9Run Score: 8

Clarence DeMar Marathon 2012

Sep 30, 2012
Partly cloudy throughout the day with late afternoon rain.
Low: 52°, High: 61°, Light Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 54°
cloudy 54°
cloudy 54°
partly-cloudy-day 55°
partly-cloudy-day 55°
cloudy 55°
cloudy 57°
cloudy 59°
Feel54°54°54°55°55°55°57°59°
Rain--------
Wind0mph
3mph
3mph
5mph
5mph
3mph
0mph
4mph
Dew52°52°52°52°51°52°52°51°
RunScoreRun Score: 8Run Score: 9Run Score: 9Run Score: 9Run Score: 9Run Score: 9Run Score: 8Run Score: 9

Clarence DeMar Marathon 2011

Sep 25, 2011
Partly cloudy throughout the day.
Low: 64°, High: 77°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
fog 64°
fog 64°
partly-cloudy-day 65°
clear-day 66°
clear-day 69°
partly-cloudy-day 73°
clear-day 74°
clear-day 75°
Feel64°64°65°66°69°73°74°75°
Rain--------
Wind0mph
3mph
0mph
0mph
3mph
3mph
4mph
2mph
Dew64°63°64°65°65°64°64°64°
RunScoreRun Score: 7Run Score: 8Run Score: 7Run Score: 7Run Score: 8Run Score: 8Run Score: 8Run Score: 8

Clarence DeMar Marathon 2010

Sep 26, 2010
Partly cloudy throughout the day.
Low: 48°, High: 70°
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 49°
clear-day 53°
clear-day 55°
clear-day 61°
partly-cloudy-day 65°
cloudy 69°
cloudy 70°
cloudy 70°
Feel49°53°55°61°65°69°70°70°
Rain--------
Wind0mph
0mph
0mph
3mph
5mph
3mph
4mph
8mph
Dew47°48°48°47°46°47°48°48°
RunScoreRun Score: 7Run Score: 8Run Score: 8Run Score: 9Run Score: 9Run Score: 8Run Score: 8Run Score: 8

Clarence DeMar Marathon 2009

Sep 27, 2009
Cloudy skies throughout the day with a chance of rain throughout the day.
Low: 48°, High: 64°, Moderate Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
rain 50°
rain 52°
cloudy 54°
rain 56°
rain 57°
cloudy 61°
rain 63°
cloudy 63°
Feel50°52°54°56°57°61°63°63°
Rainlightlight-lightlight-light-
Wind0mph
0mph
0mph
0mph
0mph
0mph
0mph
5mph
Dew48°48°50°54°56°57°59°59°
RunScoreRun Score: 6Run Score: 6Run Score: 8Run Score: 8Run Score: 5Run Score: 8Run Score: 8Run Score: 9

Clarence DeMar Marathon 2008

Sep 28, 2008
Cloudy skies throughout the day with rain.
Low: 63°, High: 73°, Light Rain
Time7AM8AM9AM10AM11AM12PM1PM2PM
Temp
cloudy 63°
cloudy 65°
cloudy 65°
cloudy 66°
cloudy 68°
cloudy 66°
cloudy 72°
cloudy 72°
Feel63°65°65°66°68°66°72°72°
Rain--------
Wind0mph
0mph
0mph
0mph
6mph
0mph
8mph
6mph
Dew61°61°61°63°63°63°63°63°
RunScoreRun Score: 8Run Score: 7Run Score: 8Run Score: 7Run Score: 9Run Score: 7Run Score: 8Run Score: 8