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Saturday, June 10 | Wompatuck State Park

We are excited to welcome you to Wompatuck State Park, Massachusetts! Hike 20 miles in 8 hours through one of South Shore’s hidden attractions, located just 20 miles south of downtown Boston.

Our single-circuit hiking loop provides everything this undeveloped and heavily wooded State Park with its 3,500 acres of forest, streams and ponds has to offer.

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!


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Time & Location

Saturday, June 10, 2023, 6:30 AM

Wompatuck State Park, 204 Union St, Hingham, MA 02043

Local Partners

At a glance


Date: Saturday, June 10, 2023


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


Starting time: Several starting slots available from 6:30 a.m. You can choose from specific time slots with limited capacity when signing up. This ensures the most remote hiking experience as a maximum of 5 participants cross the starting line at the same time. The first hikers will start as early as 6:30 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.


Venue (start/finish):

Wompatuck State Park, 204 Union St, Hingham, MA 02043
Use the Park entrance and follow the signs to our main venue (incl. start/finish/parking) at the Park’s “South Field”.


Parking: Complimentary parking will be available on site (South Field).


Aid/refreshment stations: There are up to three 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. The refreshments will vary between refreshment stations, providing water, coffee, tea, isotonic drinks, fruits, cereal bars, etc.

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.

Merchandise: Our 2023 merchandise collection can be viewed right here: Pre-orders are available until around three weeks before the event, but we will also have merchandise on site (while stocks last).

Camping and Accommodation: For camping reservations right at Wompatuck State Park please check the following link: We don't have a hotel partner as of now - please check back later! 


Route: The single-circuit loop covers 20 miles of all the beauty Wompatuck State Park has to offer. The final route will be made available around 2 weeks prior to the event.

Total elevation gain: Around 900 ft.

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

What are you waiting for? Sign up here to enter the adventure of a lifetime.


Please check out more details in our FAQ section or contact us at

The route will be made available approximately 2 weeks 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, extremely wet/muddy we will adapt it to local conditions at short notice.

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