MammothMarch New Hampshire

MammothMarch New Hampshire

MammothMarch is back in New Hampshire! We are excited to return to Bear Brook State Park. Are you ready to conquer the largest developed State Park in New Hampshire? Our scenic 20-mile route leads through the heavily forested park, featuring seldom visited marshes, bogs, summits and ponds – all ready for you to explore on August 29, 2026.

MammothMarch makes for an unforgettable weekend hiking getaway, a challenging & beautiful 20-mile adventure included. Master the challenge and spend a beautiful day in the great outdoors. Getting your finisher medal, you will be exhausted but proud and happy... as well as part of our amazing community of nature-lovers, hikers and MammothMarch addicts!

Signing up for the first time? Take a look at past events and what our participants say: https://www.mammothmarch.com/reviews

Secure your ticket now and take a look at what's included:

Please note that all prices are INCLUSIVE of mandatory charges, items, and fees.

• Spend a beautiful day hiking and finish 20 miles in 8 hours