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

Tough Mountain Challenge

Get Tough. Get Muddy. Get it Done.

July 25
7:30 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.
Big Ass Bash & Post TMC Celebration

VIP Seating

Grab a reserved VIP table on the Foggy Goggle deck and watch the action from one of the best seats in the house. Choose your experience: catch Skosh live on Friday, July 24, or on Saturday, July 25, pull up a seat and watch competitors suffer through the Tough Mountain Challenge while you enjoy a private buffet, cold drinks, and comfortable seating with unbeatable views of the mountain.

Tables are available for 2 or for groups of up to 6, with access to private amenities including a dedicated buffet.

People sitting on the Foggy Goggle Deck.
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

    Tough Mountain Challenge

    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.