Trail Running calendar near Nashua 2026-2027

An 18 mile out and back trail run from Windblown Ski Area toward Watatic Mountain Reservation, featuring steep, technical single track and uneven terrain. Prior trail running experience is strongly recommended.

Pair up for a three hour endurance relay on a two mile loop of trails and fields. Alternate laps with your partner to accumulate the maximum distance possible in this team based challenge.

A community 5K in Hillsborough, NH on September 20, 2026, organized by the Hillsboro Fire Department. The off-road course may be uneven and strollers are not recommended; registration runs March 25 to September 19 with a $30 fee.

The Arc'teryx Run Boston will take place in Milton on Sunday 20 September 2026. You can run 10 kilometers.

A 5K trail run at Goddard Park in Warwick, RI on September 26, 2026, with a bayside course and start and finish near the golf course clubhouse. Open to all ages, with published entry fee tiers and on site parking and facilities.

Trail races on the ACT Multi-Purpose Trail and Eastern Trail in Arundel with 5k, 10k, half marathon and a free kids bike race, plus medals, shirts, live music and food.

A noncompetitive multisport festival at Pawtuckaway State Park on 2026-09-26 offering swim, trail bike, and trail run options for people who identify as women, with required safety gear and mixed-terrain courses.

A trail based 5K obstacle course race at Wasserman Park on September 26, 2026, featuring 12 or more beginner to intermediate obstacles. Entry is limited to 200 participants and the fee is $40.

A trail event at Ascutney Outdoors offering 50 mile and 50K ultra runs, team relays, mountain bike races and kids fun races. Proceeds support Vermont Adaptive and registration details are published for the 2026 race weekend.

An all-trail event on the Moosup Valley State Park Trail in Moosup, CT offering 5K, 8K, 10K and a free Kids Fun Run with post-race shirts or medallions and food at Weidele's; proceeds benefit a local Rotary charity.

Trail races at the Assabet River National Wildlife Refuge in Sudbury MA include a 10K, a 30K and a 6 hour timed event. The course uses dirt and gravel double track trails with two aid stations and cupless fueling.

Run for Nature in Lowell on September 27, 2026 features a 10K trail run, a 5K run or walk and a kids one mile fun run, with marked trails and community activities supporting local conservation and education.

A 25 kilometer trail race through the Edwin L. Smith Preserve in Kennebunkport, Maine on October 3, 2026. Proceeds support the Kennebunkport Conservation Trust and registration is limited to 100 entrants.

A timed trail ultra in Cumberland RI offering 8 hour, 12 hour, and 34 hour options for individuals and teams up to four. The 4.2 mile loop mixes smooth trail and moderately technical rocky sections.

Trail races in Groton, Massachusetts on October 4, 2026, organized by local running and trails groups. Two distances, 9.5 miles and 3.4 miles, total entries limited to 250, online registration closes October 3.

A 26.4 miles trail marathon in Ashford Connecticut on October 4, 2026, run on the Nipmuck Trail with rocky and rooty sections and wood bridges. A two person relay is offered and cutoffs are set by elapsed times.

Keene Family YMCA Fall Foliage Trail Races feature 5K and 10K trail courses starting and finishing at the Keene YMCA, with chip timing, age-group prizes, and proceeds supporting YMCA programs and access.

A one-mile community event in Gilford, New Hampshire on October 4, 2026, with categories for adults, youth, and children and a complimentary shirt for those who register before September 16.

A 5K trail race and 1-mile fun run at Tibbetts Field in Madbury, NH on October 4, 2026, featuring a 2-mile loop through Powder Major Forest over natural terrain. A portion of proceeds will support a local family in need.

Trail races at Houghton's Pond in the DCR Blue Hills Reservation follow rolling dirt roads and forest paths with rocks and roots. Two distances are offered, about 7 miles and 3.7 miles, with notable elevation change on each course.