Clarence DeMar Marathon
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Clarence DeMar Marathon
The Clarence DeMar Marathon is a road running event in Keene, New Hampshire, offering both a full marathon and a half marathon. The 48th running is scheduled for Sunday, September 27, 2026.
Available race options include:
- Full Marathon
- Half Marathon
- Kids DeMar
- Super Seniors category
The course’s final third runs around and through the town of Keene. In 2019 about 500 volunteers supported the event, and field sizes were reported at roughly 400 marathoners and 450 half-marathoners. Organizers list a range of local sponsors and partners and provide race weekend information, course maps, and past results.
A keynote speaker is announced for the 2026 event. The race is presented as a longstanding local event with historical roots and community involvement in Keene, NH. Visit the organization's website for the most recent information.
