Bear Brook Trail Races

Allenstown, United States • 20 Sep 2025

Bear Brook Trail Races take place at Bear Brook State Park in Allenstown, New Hampshire. The event offers three trail races: Marathon, Half Marathon, and 10K (the 10K follows Mindy’s Loop). The Marathon doubles the Half Marathon route.

Runners encounter diverse terrain—from beautiful single-track through blueberry fields to steep uphills—showcasing the park’s natural beauty. For 2025, the race is GPX-only with minimal course markings; entrants download and navigate with the provided GPX, with maps released in advance. Aid stations are well stocked with food, water, and Tailwind; no cups, no pets, and no crews/pacers.

Marathon has a strict 9-hour cutoff. Visit the organization's website for the most recent information.

Race information

42 km
Marathon
21 km
Half Marathon
10 km
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Run rugged trails amid peak New Hampshire foliage at Vulcan's Fury in Nottingham NH on Oct 12, 2025. Half marathon and 5 Miler courses feature boulder fields, steep switchbacks and scenic stream crossings for a true fall trail test.

Join The Hamsterwheel in New Boston NH for a friendly 4 mile loop ultrarun with 6, 12, 24 and 30 hour solo and relay options. Scenic rail trail, night running, team camaraderie and quirky buckles make it a fun intro or a bold challenge.

The Hugs from Vets Trail will take place in Henniker on Sunday 2 November 2025. You can run 10 kilometers.

Windham Woods School Thankful Trails 5K Run & Walk Windham Woods School hosts the 2nd annual Thankful Trails event on November 15, 2025, at 39 Roulston Road, Windham, NH. The event includes a 5K trail run/walk and a Kids Fun Run for chi..

Run the Novemberfest Race, a scenic 4 mile through Mine Falls Park in Nashua, finishing near the Millyard smokestack. Celebrate at Martha's Exchange after the race while supporting the Nashua Children’s Home.