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

Tough Mountain Challenge

Get Tough. Get Muddy. Get it Done.

July 25
8:00 AM
South Ridge

Think you're tough? Prove it.

No training plan. No mercy. All fun.

This is fun?

NEW THIS YEAR

Think you know Tough Mountain Challenge? Think again. We've added two brand-new obstacles to the course this year, and we're not sorry about it.

A woman crawling under barbed wire at the Tough Mountain Challenge.
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.

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.

Let the kids loose

More Family Fun

Kids jumping in the mud at the Mini Mountain Challenge at Sunday River.

Mini Mountain Challenge

July 26

10:00 AM
South Ridge
The Mini Mountain Challenge is a fun obstacle course for kids ages 4–12, designed to test their grit and keep them smiling.