Pequenos Guerreiros Ninja

Athletes across the Southwest get their first chance to take on the World's Most Difficult Obstacle Course.

Athletes across the Southwest compete for a chance to take on the World's Most Difficult Obstacle Course.

The top 30 finishers from the Southwest region preliminary round compete to move into the finals

Athletes across the Midwest compete to take on the World's Most Difficult Obstacle course

Athletes across the Midwest compete to take on the World's Most Difficult Obstacle course

The top 30 finishers from the Midwest region preliminary round compete for the chance to move into the national finals in Vegas.

Athletes across the Northeast compete to take on the World's Most Difficult Obstacle course

Athletes across the Northeast continue to compete for a chance to take on the World's Most Difficult Obstacle Course. However, only 30 will move on to the Northeast regional finals--and so far only eight have defeated all of the obstacles in Miami, Florida.

The top 30 finishers from the Northeast region preliminary round take on an even more challenging course to lock a spot in the Vegas finals.

Aspiring ninjas across the Northwest land on Venice Beach to compete for a chance to tackle the World's Most Difficult Obstacle Course. Only 30 will move on to the Northwest regional finals, but first they will have to tackle a new obstacle unique to this region--the strength and balance-testing pipe slider! Will David Campbell, who went further than any American in history last year at Mount Midoriyama, get another shot at the title? Or will diabetic-turned-athlete Kyle Cochran be the standout rookie who moves on? Find out!

Athletes across the Northwest continue to battle it out for the Northwest regional finals.

The coast-to-coast search continues as the top thirty competitors from the Northwest preliminary round are narrowed down to just fifteen.

Athletes across the Midsouth gather to compete for a chance to take on the World's Most Difficult Obstacle Course.

Athletes across the Midsouth continue to compete for a chance to take on the World's Most Difficult Obstacle Course

The top 30 finishers from the Midsouth region preliminary round compete for the chance to move into the national finals in Las Vegas.

Athletes across the Southeast compete to take on the World's Most Difficult Obstacle Course

Athletes across the Southeast continue to compete to take on the World's Most Difficult Obstacle Course.

The top 30 finishers from the Southeast region preliminary round compete for a spot in the finals.

The finals begin as 100 competitors take on Stage 1 of the World's Most Difficult Obstacle Course.

The finals continue as 100 competitors take on Stage 1 of the World's Most Difficult Obstacle Course.

The finals continue as competitors take on the challenge of Stage 1 of the World's Most Difficult Obstacle Course.

Competitors continue to take on Stage 1 of the punishing obstacle course in Las Vegas.

As Stage 1 comes to a close, eighteen challengers attempt to clear eight grueling obstacles including the Step Slider, Giant Swing and the Spinning Bridge.

Top finishers tackle the four stage obstacle course modeled after the famed Mount Midoriyama in Japan.