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

Tough Mountain Challenge

Can you handle it?

Push your limits and earn bragging rights after the wildest mountain 5k of your life—packed with brutal obstacles, epic terrain, and more mud than you thought possible.

South Ridge
Man going through a mud obstacle at Sunday River's Tough Mountain Challenge.People climbing up a really steep hill at Sunday River's Tough Mountain Challenge.People walking through a glow tunnel at Sunday River's Tough Mountain Challenge.A person on the water slide at Tough Mountain ChallengePeople crossing the finish line at Tough Mountain Challenge at Sunday River.
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What Is TMC?

CAN YOU HANDLE IT? Since 2010, Tough Mountain Challenge has been New England’s go-to event for mud, sweat, beers, and bragging rights. It’s not about winning—it’s about showing up, getting filthy, and laughing your way through the pain with 3,600 other lunatics.

Think you’re tough? Prove it.

Race day is Saturday, July 26, 2025.

Learn More about Tough Mountain
  • Competitors crossing the finish line at Sunday River's Tough Mountain Challenge.

    Stay Close to the Action

    2025 Tough Mountain Challenge

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

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A Look Ahead

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