MammothMarch Delaware Valley

MAY
22
2027
A 20 mile loop through Fair Hill Natural Resources Area on May 22, 2027 with aid stations, a finisher medal and complimentary on site parking.
Sat 22 May 2027
20 miles

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MammothMarch Delaware Valley 2027

MammothMarch Delaware Valley takes place at Fair Hill Natural Resources Management Area on May 22, 2027. The event is a single-circuit loop covering 20 miles, with an overall elevation gain of around 1,600 ft. The route runs on mainly unpaved hiking trails, dirt trails, gravel roads and forest floor and follows scenic trails and creeks within the Fair Hill property, which sits near the Pennsylvania border and less than half a mile west of Delaware.

There is no official timing for participants; all who complete the distance receive a finisher medal and a personalized certificate. Participants who stop before the finish receive a certificate indicating mileage covered. Aid and refreshment stations are provided along the route, roughly every 5 to 7 miles, and include toilets plus a variety of food and drink options such as water, energy drinks, electrolytes, fruits, bars and sandwiches. These refreshments are included in the event registration.

Small starting groups are used to limit the number of hikers crossing the start at the same time. Complimentary on site parking will be available. Merchandise will be offered for collection on event day or shipped when ordered through the event shop, and MammothMarch Hiking Passes will be available for new participants while returning participants can present existing passes to collect 2027 stamps. Final route details will be published in advance of the event and lodging information will be provided later. Visit the organization's website for the most recent information.

20 mi
20-Mile Hike

Events nearby

Part of the Harford County Running Club Dog Days of Summer Series, Rigbie Farm 5k is a free, self timed grass and trail loop near Darlington, MD. Parking is at Rigbie Farm and non members may take part in three free runs.
A self-timed 5 miles on a packed rail trail in Darlington, Maryland, held as part of the Harford County Running Club Dog Days of Summer Series. The course is stroller friendly with parking at Fisherman's Log and free registration.
A self-timed loop-trail event in Havre de Grace on 08/30/2026 with a listed distance of 3 miles. Runners have 90 minutes to complete as many loops as they like; parking is at Steppingstone Farm Museum.
A half marathon and a 10K at Lums Pond State Park on 09/06/2026 using Little Jersey and Swamp Forest trails. Routes include single track and wider trails and have a relatively flat elevation profile.
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