Build on week one's regimen by mastering even more survival and navigation skills and improving your overall fitness level.

It's the final push. Complete the final week's challenge and get ready for next week's call to submit your video.

Week three of our five-week challenge will have you navigating obstacles and increasing mileage.

We're down to the last two weeks of our five-week Tough Guy Challenge. Are you still hanging in there?

Submit your video! Win a trip to Rainier and the title of America's Toughest Backpacker.

Think you're a tough guy (or gal)? Take our five-week challenge and enter our video contest for a chance to prove it.