MammothMarch Delaware Valley

MammothMarch Delaware Valley

MammothMarch is back! After three sold out events in a row, we are thrilled to be back at Fair Hill in northeast Maryland for MammothMarch Delaware Valley 2026! Once one of the largest private land holdings in the east, Fair Hill Natural Resources Area – known for its 5,656 acres of pristine fields, woodlands and natural beauty – is once again all yours to conquer. Bordered by Pennsylvania to the north and less than half a mile west of Delaware, Fair Hill was previously owned by William duPont, Jr., an avid equestrian rider who acquired the farmland to enjoy riding as well as fox chasing. Today, it’s a picture-perfect spot for one of our most popular 20-mile hikes. Master the challenge and spend a beautiful day hiking 20 miles at a stretch. 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!

What's Included:

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

Registration fees

• Prices are inclusive of mandatory charges, items, and fees
• SUPER EARLY BIRD: $63.18
• EARLY BIRD: $73.71
• $84.24
• $94.77
• $105.30
• $115.83