Flat Rock Trail Race
Dunstable, United States • 13 Jun 2026
Event Overview
The Flat Rock Trail Race is a benefit for the Humane Society for Greater Nashua. The event is held in Dunstable, Massachusetts.
Distances & Format
The race offers two formats on a 5-mile loop course.
- Flat Rock 5 Mile: Participants complete one 5-mile loop.
- Flat Rock 6 Hour: Participants complete as many 5-mile loops as possible within a six-hour time limit.
Course Description
The course features nearly 600 feet of elevation gain per loop. It traverses the Arched Bridge Conservation Area, part of an old railroad bed, a former granite quarry and farm, and the tops of the old Blanchard Hill Ski Area and Flat Rock Hill. The loop is well-marked.
Additional Information
The event is held with permission from the Dunstable Conservation Commission and the Dunstable Rural Land Trust. The race will be held regardless of weather conditions. Entry fees are non-refundable and non-deferrable; any unclaimed fees are donated to the Humane Society for Greater Nashua. Visit the organization's website for the most recent information.