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    • Home
    • A wicked dirty 5k race with tough obstacles and even tougher competitors

    • About
    • Tough Mountain challenge is a 3+-mile obstacle race on the slopes of Sunday River in Western Maine

    • Registration
    • Register for the Tough Mountain Challenge, a 4-mi obstacle race in the mountains of Western Maine at Sunday River Resort.

    • The Course
    • See all 20 obstacles on the Tough Mountain Challenge Course.

    • FAQ
    • Everything you need to know about the Tough Mountain Challenge

    • Mini Mountain
    • A kid-sized version of the Tough Mountain Challenge for ages 4-12.