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

Mini Mountain Challenge

Let the Kids Loose

Let the little adventurers loose! The Mini Mountain Challenge is a fun obstacle course for kids ages 4–12, designed to test their grit and keep them smiling.

July 26
10:00 AM
South Ridge
A little girl receiving her medal after finishing the Mini Mountain Challenge at Sunday River.Kids walking through the mud pit at the Mini Mountain Challenge at Sunday River.Kids leaping into a pile of muddy water at the Mini Mountain Challenge at Sunday River.A kid sliding down a water slide at the Mini Mountain Challenge at Sunday River.
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About

Mini Mountain offers a kid-friendly version of Tough Mountain for ages 4-12. It features uphill and downhill running, dirt, mud, fun obstacles, and even snowguns!

The challenges and distances increase for older kids. The event has three heats, and each heat has a course tailored to its age group.

Sign up by May 31st to guarantee a t-shirt!

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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.

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Painfully fun family memories

More Family Fun?

A guy flying into the water at Sunday River's Tough Mountain Challenge.

Tough Mountain Challenge

July 25

8:00 AM
South Ridge
Think you're tough enough? Join 3,600 lunatics this July for a 5K of mud, water, walls, and whatever else we feel like throwing at you.
Oh, It's FunRegister Now