MammothMarch Boston

JUN
5
2027
A 20 mile single loop hike at Wompatuck State Park on June 5, 2027, featuring aid stations, a finisher medal, certificates, and varied trail terrain.
Sat 5 Jun 2027
20 miles

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About the race

MammothMarch Boston is a single-day hiking event held on June 5, 2027, at Wompatuck State Park in Hingham, Massachusetts. The course is a single 20 mile loop that showcases paved and unpaved hiking trails, dirt trails, gravel roads and forest floor across the park’s wooded terrain. The route has a total elevation gain of around 950 ft.

Parking will be available on site. The event includes aid and refreshment stations roughly every 5 to 7 miles that provide toilets, food and drinks. Typical offerings at these stations include water, energy drinks, electrolytes, fruit, cereal or protein bars and peanut butter and jelly sandwiches. Participants receive a personalized certificate after finishing; those who stop early receive a certificate stating the distance completed. All finishers are awarded a finisher medal and entries are recorded for the event’s wall of fame.

MammothMarch issues Hiking Passes for new participants and accepts passes from previous editions for on site stamping. Merchandise for the Boston event is available through the event store for pick up on event day, while items ordered from the official online shop are shipped. The final route map is scheduled to be published about two weeks before the event. Visit the organization's website for the most recent information.

20 mi
20-Mile Hiking Adventure

Events nearby

A community cross-country 5K at Franklin Park on October 3, 2026, open to Boston Latin School affiliates and local runners and walkers with team options and tiered fees.
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.
Community 5 mile trail run at Lynn Woods Reservation with a no drop pace, Norvan trail vest demos, post-run refreshments, and free parking.
10 km trail race in Milton MA on 10/11/2026 featuring a moderately technical, low elevation course; registration runs 9/25 to 10/11, fee $20.
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