Spartan Race

Scenes from the Spartan Race World Championships that took place on Oct. 2.

The 39-year-old future NFL Hall of Famer put his speed, strength and stamina to the test on Oct. 2 during the Spartan Race World Championship weekend.

Here are photos from the 2014 Spartan World Championships in Vermont.

The 16-mile course in Vermont pushes racers to their limits.

A guide to the four obstacle course racing championship events this fall.

Cody Moat will be a top contender in the 2014 Spartan Race World Championships.

Dallner nearly died in a climbing accident three years ago, and then he became an obstacle course racer.

The fast-growing race event announced today the formation of the 2014 Spartan Race Triple Crown, a three-race championship with more than $500,000 in prize money at stake.

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.