top of page


MammothMarch New Hampshire

We are excited to host our New Hampshire premiere at Bear Brook State Park!

The Granite State is beautiful in late September, and it's the perfect time of year for our 20-mile hiking adventure.

Our scenic route leads through the heavily forested park, which includes seldom visited marshes, bogs, summits and ponds – all ready for you to conquer on September 21, 2024.

Mastering our challenge, you will be exhausted, but proud and happy... as well as part of our amazing community of nature-lovers, hikers and MammothMarch addicts

Website pic NH.JPG

At a glance

Date: Saturday, September 21, 2024

Location & venue (start/finish): Bear Brook State Park, 157 Deerfield Rd, Allenstown, NH 03275 (our venue does not have an address but will be marked. The entry is close to the Park’s main office)

Local Partners:

Distance: 20 miles in 8 hours There is no timekeeping, there are no failures, we only recognize the incredible courage it takes to rise to our challenge. Every participant completing the distance will be awarded their finisher medal and considered a winner!


Starting time: You can choose from several time slots as early as 7:00 am with limited capacity when signing up. This ensures the most remote hiking experience as a maximum of 5 hikers will cross the starting line at the same time. The first ones will head out between 7:00 – 7:15 a.m. with the majority coming back in just about 8 hours. However, we will have our finish line open for the ones that need a bit more time

Parking: Complimentary parking will be available on-site.

Camping: Reservations at Bear Brook State Park can be made right here.

Aid/refreshment stations: There are water stops and aid stations along the route (approximately positioned every 5-7 miles apart) providing toilets, food, and drinks for all participants. These refreshments are included in the cost of your ticket and vary between each station, offering water, energy drinks, electrolytes, fruits, cereal/protein bars, sandwiches and more..

Certificates: All finishers will receive their personalized certificate after crossing the finish line. For the ones who drop out, we will issue certificates stating the mileage covered.

Finisher medal/wall of fame: For all participants finishing MammothMarch.

Hiking Pass: MammothMarch Hiking Passes will be made available for all new participants. All participants from a previous edition or different MammothMarch events should bring their Hiking Pass to collect their 2024 stamps on site.

Merchandise: Our 2024 merchandise collection is available right here.


Route: The single-circuit loop covers 20 miles of all the beauty Bear Brook State Park has to offer, including the Lowland trail, Cascade trail, Pitch Pine trail & many more. The final route will be made available around 2 weeks prior to the event.

Total elevation gain: Around 1,700 ft.

Terrain: A great mix of everything: Paved and unpaved hiking trails, dirt trails, gravel roads, forest floor

What are you waiting for? Click here to sign up for the adventure of a lifetime.


Please check out more details in our FAQ section or send us an e-mail at

The route will be made available for download, including GPS coordinates, prior to the event. Please note that the route is preliminary and may be adjusted due to weather issues, official directives, and/or organizational matters. The route will be marked 1-2 days prior to event day. Should we notice parts of the route being inaccessible or extremely wet/muddy, we will, of course, adapt it to local conditions at short notice..

REIGN_Storm_Horizontal_Logo_Light (1).png
Zealios Black Logo 300dpi.png
bottom of page