MammothMarch New Hampshire 2026

MammothMarch New Hampshire is a 20-mile endurance hike in Bear Brook State Park. It has an 8-hour limit and begins at 7:00 AM. This late-summer event is for those seeking a long day on trails, differing from a conventional road race. The format is straightforward: complete the distance on foot and finish within the cutoff time. The route crosses a heavily forested park, featuring terrain that includes marshes, bogs, summits, and ponds. The event targets nature enthusiasts, hikers, and returning MammothMarch participants. Finishers are awarded a medal. Its draw lies in the combination of distance, time constraint, and New Hampshire's backcountry, particularly the less-explored wetland areas within the park.