Season 4
201232 episodes
2.5
May 20, 2012
People from the Southwest compete for a chance at the world's most difficult obstacle course.
Episode 3
Southwest Regional Finals
May 22, 2012
The top 30 finishers from the Southwest qualifying round take on an even more challenging obstacle course to advance to the national finals.
Episode 4
Midwest Regional Qualifying Round (1)
May 27, 2012
Midwest competitors try to qualify for the national contest.
Episode 5
Midwest Regional Qualifying Round (2)
May 27, 2012
Midwest competitors try to qualify for the national contest.
Episode 6
Midwest Regional Finals
May 21, 2012
The top 30 qualifiers compete for a chance to move on to the national finals and tackle a harder course in hope of getting the $50,000 prize.
Episode 7
Northeast Regional Qualifying Round (1)
May 28, 2012
Athletes from the Northeast compete.
Episode 8
Northeast Regional Qualifying Round (2)
May 29, 2012
Athletes from the Northeast compete.
Episode 9
Northeast Region Finals
June 3, 2012
The top 30 Northeast finishers take on a more challenging course.
Episode 10
Northwest Regional Qualifying Round (1)
June 3, 2012
Contestants from the Northwest compete.
Episode 11
Northwest Regional Qualifying Round (2)
June 4, 2012
Contestants from the Northwest compete.
Episode 13
Midsouth Regional Qualifying Round (1)
June 10, 2012
Competitors from the Midsouth region.
Episode 14
Midsouth Regional Qualifying Round (2)
June 10, 2012
Competitors from the Midsouth region.
Episode 16
Southeast Regional Qualifying Round (1)
June 12, 2012
Athletes and everyday people compete for a chance to take on the World's Most Difficult Obstacle Course.
Episode 17
Southeast Regional Qualifying Round (2)
June 17, 2012
Athletes and everyday people compete for a chance to take on the World's Most Difficult Obstacle Course.
Episode 18
Southeast Regional Finals
June 17, 2012
The top 30 Southeast finishers compete on a more challenging course..
Episode 19
Las Vegas Finals (1)
June 18, 2012
One hundred competitors attempt the most-difficult obstacle course.
Episode 20
Las Vegas Finals (2)
June 19, 2012
Stage 1 of the most-difficult obstacle course continues.
Episode 21
Las Vegas Finals (3)
June 24, 2012
Stage 1 of the most difficult obstacle course continues.
Episode 22
Las Vegas Finals (4)
June 24, 2012
Stage 1 of the 8 obstacle course will challenge even the most skilled competitors.
Episode 24
Las Vegas Finals (6)
June 26, 2012
Ultimate challenges including the Spider Flip and the Double Salmon Ladder.
Episode 25
Best of Southwest
July 8, 2012
Previously unseen footage includes top finishers from preliminary rounds tackling a challenging obstacle course.
Episode 26
Best of the Midwest
July 8, 2012
Competitors face a challenging obstacle course in hope of landing a spot in the finals.
Episode 27
Best of Northeast
July 8, 2012
Top contenders tackle a challenging obstacle course in hope of moving to the final round.
Episode 28
Best of Northwest
July 9, 2012
Competitors face a challenging obstacle course in hope of landing a spot in the finals.
Episode 29
Best of Midsouth
July 10, 2012
Athletes face the eight obstacles of Stage 1 in Las Vegas.
Episode 30
Best of Southeast
July 16, 2012
Finalists take on a four-stage course. Challenges include a "jumping spider" and a "spinning bridge."
Episode 32
Best of the Finals (2)
July 24, 2012
Top finishers from the regionals advance to the final round.
