The 16-mile course in Vermont pushes racers to their limits.
Dallner nearly died in a climbing accident three years ago, and then he became an obstacle course racer.
The former cross country runner is now one of the top competitors on the obstacle racing scene.
The Australian athlete talks about how she trains for long-distance obstacle races.
Alex Roudayna is an emerging international obstacle racing star.
This former collegiate track runner has become a force on the obstacle racing circuit.
Pak blends his passion for obstacle course racing with his mechanical engineering background.
Here's a glance at 14 of the toughest obstacles you'll encounter in a Spartan Race.
Will the Death Race continue? Or will another event emerge?