Trail Running calendar near Sudbury 2026-2027

Group trail run for women and nonbinary people on a 3 mile loop in the Fells at an easy 11 to 12 minutes per mile pace; steady rain or thunder cancels.

A 5.5 mile mountain trail race at Soapstone Mountain in Somers CT organized by Shenipsit Striders. The course features six ascents, steep rocky sections, a field capped at 50 runners, and required online registration.

A roughly 3.8 mile trail race at Kingman Farm in Madbury, NH on July 26, 2026, featuring rolling nordic style paths and switchback singletrack; proceeds support the Doug Flutie Jr. Foundation for Autism and day of registration is available.

A Last Man Standing charity run at EverybodyFights in Boston raising funds for the Brain Aneurysm Foundation, with mile repeats, post-run refreshments and raffles.

A community 5K trail race at Legacy Park with professional timing, a post-run gathering featuring grilled burgers and local beer and wine tasting for registrants 21 and over, and a limit of 500 participants.

Muddy Dash Boston is a family-friendly 5K mud run at 508 INTL Adventure Sports Center on August 1, 2026, with obstacles, mud pits and slides, plus a pre-party and an after-party with music and food.

A community cross country meet at Stonington High School offering a 5K and a children's 1/2 mile. The course mixes track, quiet campus streets, trails, grass, and finishes back on the track.

A community fundraising day in Groton, MA on August 5, 2026 featuring an 8.4 mile three-person relay, kids single-loop race and Little Lambs mini runs, followed by barbecue and activities, with proceeds to six local charities.

A four mile beach run at low tide on Nantasket Beach in Hull, Massachusetts. The out and back course starts near the Mary Jeanette Murray Bath House and raises funds for Hull Boosters and The Emma Ryan Memorial Fund.

A seaside set of timed ultra-marathon events at Colt State Park in Bristol, Rhode Island, offering 6 hour, 12 hour, and 24 hour formats with separate entry periods and fees.

A trail event at Noon Hill Reservation in Medfield offering a 10 mile loop plus 50K and 40 mile ultra options, mostly singletrack with roots, rocks, and a scenic Noon Hill vista; proceeds benefit The Trustees of Reservations.

The 15th Annual 5k Race to the Ledges in Concord, NH on August 8, 2026 features a short road and trail course and includes post-race brunch boxes to take away. Registration includes an adult 5 km entry and a free kids 5 km for ages 6 and un..

A community 5 km run in Derry, New Hampshire on August 8, 2026, with adult and kids categories and online registration closing August 7, 2026.

A multi day timed trail event on a Winchendon farm using a roughly two mile loop. Runners choose from six hour day or night, 12 hour, 24 hour, or 48 hour formats under the Sturgeon Moon.

A free eight hour trail event in Tolland on August 15, 2026 where runners complete as many 3 mile loops as they wish. The event includes on-site food, a potluck, and a GPX course map.

A 5K off-road trail run, walk, and hike at White Barn Farm through Wrentham conservation land. The event is part of the Farm to Trail 5K Series and raises funds to support local agriculture and food pantry donations.

A chip-timed 5K run/walk at Brimfield Winery on a two-lap grass course with hills, race swag, a wine pour, and age group awards; a one-lap 1.5 mile division is available.

A family friendly 5K on the Webb Forest trails organized by Wilmot Learning Place, featuring a signed course, water stations, timing for runners, post-race recognition, and nearby parking with overflow at local fields.

Trail runs over Vineyard Hill and through Bradley Palmer State Park offering 5K and 10K courses with one Start/Finish aid station, local prizes, and chip timing as part of the North Shore Trail Series.

A trail ultramarathon at Prospect Acres Ranch where runners complete repeated 2.2 mile laps in 2, 4, or 8 hour formats. Field camping is available Friday evening and registration is $40 with proceeds supporting future events.