During peak foliage season, you start in rural Gilsum, NH,  run through country roads and end in downtown Keene.   The course is USATF certified and a Boston Qualifier.

Clarence Demar Marathon

Post-Race Review/ Results

Photos taken during the 2024 Clarence DeMar Marathon on Sunday, September 29.

In Photos: On your mark, get set, DeMar!

Pre-Race Review/ Lineup

The 2023 Clarence DeMar Marathon on Sunday, September 24, is named after this legendary runner whose death proved running is good for the health, contrary to the belief of the times.

Hundreds of runners are expected for the 45th annual Clarence DeMar Marathon

The 2022 Clarence DeMar Marathon will be held this Sunday, September 25, in Keene, NH.

Clarence DeMar Marathon: Time To Break a Sweat

Olympic Gold Medalist Frank Shorter will be the speaker at the pre-race pasta dinner for the 2022 Clarence DeMar Marathon; registration opens on January 1 for the September 25 event.

Tokyo Olympics: Clarence DeMar Marathon to Bring Olympic Gold Medalist Frank Shorter as Keynote Speaker for Race 2022

Scenic Course, fun crowd, and very well organized

A Great Autumn New England Small Town Experience

Beautiful course, great volunteers & organization

2nd oldest marathon in USA - character & history

Scenic and unique, a top destination marathon

Apart from Boston, this is my favorite race.

Already-high expectations were blown away

A great race run by awseome people in a nice town.

Wonderful initiation into the world of marathoning

Great marathon with fantastic volunteers!

This marathon was so awesome I couldn't wait to ra

This is an outstanding race, if as I do, you like

Nice Little Marathon for Self-Sufficient Runners

Great, small, classic, fall, New England course

Organization would get 6 stars if I could

One of my favorites, but needs more traffic contro

I was one of the people who got lost with you...

Affordable, friendly, scenic, well-organized

A nice run through Southern New Hampshire

Scenic, rolling course w/ respite (flats).

This is a "must" marathon for New England

Thank you for your interest in the Clarence Demar Marathon! If you have any additional questions, please feel free to ask using this form. We’ll do our best to respond as soon as possible.