Flat Rock Trail Race

Flat Rock Trail Race

Saturday, Jun 13, 2026 @ 8:00 AM

510 High Street, Dunstable, MA

The Flat Rock Trail Race is a benefit for the Humane Society for Greater Nashua. The course is a 5-mile loop with nearly 600 feet of elevation gain per loop in beautiful Dunstable, Mass. You will start the race by going over the Arched Bridge of the Arched Bridge Conservation Area, down part of the old Nashua, Acton and Boston Railroad bed, then run around a former granite quarry and farm, plus climb to the tops of the old Blanchard Hill Ski Area and Flat Rock Hill!

Run/Walk/Hike this well marked loop once for the 5-Mile Race, or for the 6-Hour Race go as many times as you like within the six hour limit.

We'd like to thank the Dunstable Conservation Commission as well as the Dunstable Rural Land Trust for their permission to have the race on the trails. Their support, as well as the support of the Town of Dunstable are very important to us. Please join us in being great guests to the area!

Race & Course Information

Please see the Flat Rock Trail Race web site for plenty of additional information! You can find more information about the race, as well as information about the course on the site. The website also has information about the historical aspects of the course and information about volunteering. Volunteer signups will open in late April.

No Refunds or Deferrals

If for any reason you are not able to attend the race, there are no deferrals and no refunds. Your entry fee will be a donation to the Humane Society for Greater Nashua to help care for their pets looking for homes as well as bringing low cost services to the community. Thank you for your donation! The race will be held rain or shine.