The Race

Based at Sunday River Resort in Western Maine, the Tough Mountain Challenge is an adventure obstacle race that combines alpine terrain with natural and manmade obstacles. At just 3.2 miles in length, you might think this will be a quick hike, but you'll change your mind as soon as you take off running up a mountain under an arsenal of snowguns or scrambling through the mud. Tough Mountain Challenge is a timed event, but it's not about whether you finish first or last—it's about testing yourself and pushing your limits then celebrating your accomplishment once you cross the finish line. What's more, the Tough Mountain Challenge is limited to a fixed number of competitors in each heat, which are spaced out, so you won't feel crowded or rushed on the course. For the kids, we also run the Mini Mountain Challenge

Still have questions? Want to volunteer? Check out our Frequently Asked Questions


2019 Schedule 

Stay tuned for full 2020 schedule.

Friday, July 26

Early Check-In
South Ridge Lodge, 5-9PM

Get your race packet and swag the night before for a stress-free race day. 

Big Ass Bash
Slopeside at South Ridge, 6-9:30PM

A pre-race party like no other, enjoy live music from Skosh, a cookout, and plenty of fun with your fellow competitors. 


Saturday, July 27

South Ridge Lodge, 7AM

Competitors can start checking in at 7AM, and we recommend that you get there at least an hour before your heat to get your race packet and swag. 

First Heat of Tough Mountain Challenge
Slopeside at South Ridge, 8AM

Heats will run on schedule, weather permitting, until the last one goes out at 2:10PM. Be sure to hang out for the awards ceremony after the last competitor crosses the finish! 


Sunday, July 28

Mini Mountain Challenge Check-In
South Ridge Lodge, 7:30-9AM

Pre-registered kiddos can check-in for their race and get their t-shirt. 

Mini Mountain Challenge
Slopeside at South Ridge, 10AM

In a smaller version of the Tough Mountain Challenge with kid-friendly obstacles, ages 10-12 will race at 10AM, ages 7-9 at 10:30AM, and ages 4-6 at 11AM. 



Sunday River offers two full-service hotels, complete with heated outdoor pools, restaurants, and health clubs, as well a comfortable and budget-friendly inn -- all located right at the resort and just minutes from the event venue. Book lodging online or call 800-543-2754.