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MammothMarch Missouri is sold out!

To enter our 2024 waiting list, check out this link. We will notify you in case additional tickets become available (first come, first served) and keep you posted on future editions.

We are excited to have once again secured the remote Weldon Spring Conservation Area and its excessive trail system for our 2024 MammothMarch edition.

Hike 20 miles along a great mixture of diverse trails, such as Katy Trail and Lewis & Clark Trail featuring superb overlooks of the Missouri River.

Our single-circuit hiking loop starts and finishes at the beautiful Defiance Ridge Vineyards, located just half an hour west of St. Louis.

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Location & venue (main event venue incl. start/finish): Defiance Ridge Vineyards, 2711 S Missouri 94, Defiance, MO 63341

Local Partners:

At a glance


Date:  Sunday, September 8, 2024  


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 7:15 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 7:15 – 7:30 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. 


Parking: Complimentary parking will be available right on site


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 leads through Weldon Springs Conservation Area, along various trails, such as Hamburg Trail, Lewis & Clark Trail, Katy Trail. Check out our 2023 route right here


Total elevation gain: Around 1,400 ft

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

What are you waiting for? Sign up here to enter “not your average hike.”


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