Remarkable course. Deep roots.

The Clarence DeMar Marathon and Half Marathon have heart—and history. Read more about Clarence DeMar
DeMar runners at start

DeMar: The race to run in New Hampshire.

Whether you’re a first-timer or a 50-stater, there’s only one race to run in New Hampshire. At DeMar, you’re not treated as an entrant, but a guest of honor. See what makes DeMar different

2020 Keynote Speaker: Bill Rodgers


What others are saying about the DeMar Marathon

  • A lovely small marathon that is very well organized and supported. A big thank you to the race director for not cancelling due to the heat – as someone working on 50 States, this was huge. The ice at every water stop was tremendously helpful as were the misting stations. Great volunteers all along the course, good food at the end, and lots of it!

    Cathie 2017
  • As a runner and a race director I can say that this is quite simply one of the finest half marathons I have run. The volunteers are all helpful and cheerful even at 6 am! The course is beautiful with PR potential which is a great combination. Also the finish line under the arch at Keene State makes you feel like you are in the Olympics. Run this race!”

    Grant 2017
  • Gorgeous marathon through spectacular scenery. The best part, though, is the incredible race director and the volunteers. This is one of the best, and a must-do marathon!

    Nancy 2017
  • This was my first marathon and boy am I glad I chose this one to upgrade my running milestones. Great race, nice location. This event is so well organized; they even let me change from the half to the full at the last minute. The volunteers were awesome, and coordination with local law enforcement was great to keep everyone safe. The cheering at the finish line was INCREDIBLE AND MOTIVATING as well as all the fun signs hung along the way. I’ll be back.

    Shae NH 2016
  • Gorgeous marathon through spectacular scenery. The best part, though, is the incredible race director and the volunteers. This is one of the best, and a must-do marathon!

    Nancy AK

We appreciate the support of all our sponsors

DeMar Level

hoffman family foundation logo

Savings Bank of Walpole logo

Qualifier Level

Cheshire Health Foundation Logo

City of Keene Logo

Half Marathon Level

True North Networks logo

AFHY logo

w.s. badger logo

Water Station Level

Ted's Shoe & Sport logo

Keene Sentinel logo

The Insurance Source logo

John G. Burk & Associates logo

C&S Wholesale Grocers logo

Hogancamp PC logo

Hamblet Electric logo

Melanson Logo

Ken Jue & Associates Logo

Deep Roots Massage Logo

KSC Logo

timken logo

AMT productions

monadnock broadcasting group logo

ann henderson interiors logo

Marion Lefrancois in Memory of Ellen Lefrancois

Philip Jue


Brick House Pizza

Kids DeMar Level

C&S Wholesale Grocers logo

IPG Employee Benefits logo

Griffin Construction logo

Whitney Brothers Logo

Masiello Insurance Logo

edward jones logo

Course Level

Tim Small Sales, LLC

New Hampshire Trust Company

Lindy's Diner

Bergeron Construction

Kulick's Market

Lab 'n Lager

Evolution Chiropractic

Westside Animal Hospital

Keene Courtyard by Marriott

StingRay Optics

Crotched Mountain Foundation

ABTech, Inc.

Dr. Craig F. McBeth

Westfall Family

Friend Level

Bradley & Faulkner, P.C.

Quality Care Collision

LaValley Building Supply

Charter Oak Consulting

Swanzey Oil

Clark-Mortenson Agency

Keating Plumbing and Heating

Lynn C. Rust, CPA PC


Powers, Smith & Associates

Law Office of Pamela P. Little, PLLC

Julianna Fedrizzi

Elm City Bagels

J.D. Stinson

Peter Fedrizzi

Creative Age Publications / MedEsthetics Magazine

NH Forge

Tree Free Greetings