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A competitor at Tough Mountain Challenge going through a mud obstacle.

Tough Mountain Challenge

Get Tough. Get Muddy. Get it Done.

Register Now
July 25
8:00 AM
South Ridge

Think you're tough? Prove it.

No training plan. No mercy. All fun.

Sign up and find out what you're made of

What is TMC?

Since 2010, Tough Mountain Challenge has been New England's go-to event for mud, sweat, beers, and bragging rights. You'll survive 5K of mud, water, walls, woods, and whatever else we feel like throwing at you, laughing your way through the pain with 3,600 other lunatics.

Whether you're a first-timer or a TMC veteran, the challenge is the same: survive, finish, and celebrate.

Race day is Saturday, July 25, 2026.

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A person flying into a pool of muddy water at the Tough Mountain Challenge at Sunday River.A person smiling through the pain at Sunday River's Tough Mountain Challenge.People climbing up rocks at Tough Mountain Challenge.People walking up a giant hill at Tough Mountain Challenge.People happy on a water slide at Tough Mountain Challenge.
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  • Competitors crossing the finish line at Sunday River's Tough Mountain Challenge.

    2026 Lodging Deal

    Early Registration

    Early registrants get exclusive access to Tough Mountain lodging deals.

    Save up to 20% on resort lodging on Tough Mountain Challenge weekend using promo code TMC.

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