2027 Registration Now Live

Get In or Get Left Behind

New England's toughest mountain race is back. 2027 Registration is now open.

Race Day: July 24, 2027

2027 Registration
Think you're tough? Prove it.

No training plan. No mercy. All fun.

A woman doing a rock climb at Tough Mountain Challenge.

TOUGH MOUNTAIN CHALLENGE

You’re not here to win. You’re here to survive 5K of mud, water, walls, woods, and whatever else we feel like throwing at you.

Sign up now for the lowest price—because pain is temporary, but overpaying is forever.

Race day is Saturday, July 24, 2027.

Participants at the Tough Mountain Challenge at Sunday River Resort, in Newry, Maine, climb up the side of a trail covered with water, tires, and rope during the obstacle course.

2027 Lodging Deal

Early registrants get exclusive access to Tough Mountain lodging deals. Why? Because you didn’t wait around like a maybe. You committed. You’re in. Now enjoy the perks.

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

Book NowExplore Hotels
TMC? MMC? WTF?

Learn More. Then Sign Up Anyway.

  • An athlete with goggled climbing up the hill at the Tough Mountain Challenge at Sunday River.
    Walls, Hills, Hurt

    Tough Mountain Challenge

    Think you're tough enough at 7:30AM? Heats kick off then, so quit sleeping in and show up ready.

    2027 RegistrationNeed More Info?
  • A young child competing in the Mini Mountain Challenge
    Let the kids loose

    Mini Mountain Challenge

    This one's for the kids! Registration for 2027 is now open.

    2027 RegistrationNeed More Info?
  • A group of athletes finishing the line of the Tough Mountain Challenge
    All the Dirty Details

    About The Race

    Need more convincing? Okay, here are some more details.

    Don't Chicken Out
It's not pretty, that's the point

Pain Looks Good on You

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Athletes climbing up a super tall hill at Sunday River's Tough Mountain Challenge.People crossing the finish line at the Tough Mountain Challenge.A man with his tongue out crawling through mud at the Tough Mountain Challenge.Athletes jumping through muddy pits at Sunday River's Tough Mountain Challenge.A man going through a muddle obstacle at Sunday River's Tough Mountain Challenge.A woman smiling in a mud pit at Sunday River's Tough Mountain Challenge.A woman going down a slide, with her hands in the air, at Sunday River's Tough Mountain Challenge.
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