Part 1 of 2. The fifth season opens with a qualifying round in Venice Beach, Cal., and features obstacles such as the Frame Slider, Domino Hill, Chain Swing and Flying Nun Chucks.

The conclusion of the two-part Season 5 opener features a qualifying round in Venice Beach, Cal., with obstacles such as the Frame Slider, Domino Hill, Chain Swing and Flying Nun Chucks.

Part 1 of 2. A qualifying round in Baltimore features obstacles such as the Downhill Jump, Prism Tilt, Swing Jump and Circle Cross.

Conclusion. A qualifying round in Baltimore features obstacles such as the Downhill Jump, Prism Tilt, Swing Jump and Circle Cross.

Part 1 of 2. A qualifying round in Miami featuring the Utility Pole Slider, the Balance Bridge, the Slider Jump and the Monkey Peg. Contestants include Olympic medalist Dee Dee Trotter.

Conclusion. A qualifying round in Miami featuring the Utility Pole Slider, the Balance Bridge, the Slider Jump and the Monkey Peg. Contestants include Olympic medalist Dee Dee Trotter.

Part 1 of 2. A qualifying round in Denver featuring obstacles such as the Rolling Log, the Rotating Bridge, the Jump Hang Kai and the Grip Hang. Contestants include professional snowboarder Graham Watanabe.

Conclusion. A qualifying round in Denver featuring obstacles such as the Rolling Log, the Rotating Bridge, the Jump Hang Kai and the Grip Hang. Contestants include professional snowboarder Graham Watanabe.

Part 1 of 2. Thirty contestants compete in the Venice Finals. The course features obstacles such as the Salmon Ladder, the Rope Maze, the Cliffhanger and the Spider Climb.

Conclusion. Thirty contestants compete in the Venice Finals. The course features obstacles such as the Salmon Ladder, the Rope Maze, the Cliffhanger and the Spider Climb.

Part 1 of 2. Participants compete in the Baltimore finals. The course features 10 obstacles, including the Rumbling Dice and Body Prop.

Conclusion. Participants compete in the Baltimore finals. The course features 10 obstacles, including the Rumbling Dice and Body Prop.

Part 1 of 2. The Top 30 competitors attempt the Miami Finals course, which includes two new obstacles: the Ledge Jump and the Rolling Steel.

Conclusion. The Top 30 competitors attempt the Miami Finals course, which includes two new obstacles: the Ledge Jump and the Rolling Steel.

Part 1 of 2. Thirty competitors attempt the Denver Finals course, which includes two new obstacles: the Floating Stairs and the Pole Grasper.

Conclusion. Thirty competitors attempt the Denver Finals course, which includes two new obstacles: the Floating Stairs and the Pole Grasper.

The top finishers from the regional finals face a course modeled after Mount Midoriyama in Japan. Competitors try stage 1.

The top finishers from the regional finals face a course modeled after Mount Midoriyama in Japan. Competitors try stage 1.

The top finishers from the regional finals face a course modeled after Mount Midoriyama in Japan. Competitors try stage 1.

The top finishers from the regional finals face a course modeled after Mount Midoriyama in Japan. Competitors try stage 2.

The top finishers from the regional finals face a course modeled after Mount Midoriyama in Japan. The remainen competitors try stage 3.

Season 6 opens with a qualifying round in Venice Beach, Cal., and features obstacles such as the Slack Ladder, the Jumping Bars Into Cargo, and the Cannonball Alley. Contestants include Olympians Susan Francia and Kate Hansen.

Competition in Dallas includes Tilting Table, Ring Toss and Swinging Frames.

New obstacles in St. Louis include Rope Junction Into Cargo, Double Tilted Ladder and Crazy Cliffhanger. Competitors include X-Games athlete Kevin Robinson, motorcycle racer Domonic Anderson and Nick Groff ("Ghost Adventures").

A qualifying round in Miami featuring the Dancing Stones, the Downhill Pipe Drop and the Mine Field. Contestants include wakeboard champions Rusty Malinoski and Shaun Murray; Olympians Fabien Lefevre and Preston Griffall; and former Las Vegas finalists Joyce Shahboz, Drew Drechsel and David "Flip" Rodriguez.

The final qualifying round takes place in Denver and features the never-before-seen Cat Grab and Spikes into Cargo obstacles. Contestants include former competitor Brian Arnold; mixed-martial-arts fighter Michelle Waterson; Bull Bullard of the Harlem Globetrotters; BMX champ Morgan Wade; and fitness blogger Drew Manning.

The Top 30 contenders from the Venice Qualifier compete in the Venice Finals course, which includes obstacles such as the Salmon Ladder, Cannonball Alley, Body Prop and Spider Climb.

The Top 30 contenders from the Dallas Qualifier compete in the Dallas Finals course, which includes obstacles such as the Salmon Ladder, Swinging Frames, Pole Grasper and Spider Climb.

The Top 30 contenders from the St. Louis Qualifier compete in the St. Louis Finals course, which includes obstacles such as the Salmon Ladder, Rumbling Dice, Crazy Cliffhanger and Spider Climb.

Top competitors from the Miami qualifier face the finals course, which includes Salmon Ladder, Floating Stairs, Mine Field and Spider Climb.

Competitors face the finals course in Denver.

Highlights from the season focus on the competitors that provided the most impressive or entertaining runs through what many consider to be the world's most difficult obstacle course.

Top finishers from the regional finals tackle stage 1 of the four stage finals course in Las Vegas.

Top finishers from the regional finals continue to tackle stage 1 of the four stage finals course in Las Vegas.

The National Finals in Vegas continue with stage 2 and beyond.

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Qualifying comes to Kansas City, Missouri where competitors face new obstacles, including the Big Dipper, Floating tiles, and Stretch Hold. Veteran contestants include Meagan Martin (the first woman to complete the Jumping Spider last season), Brian Arnold and the "Wolfpack" rock climbing team.

Qualifying comes to Houston, Texas where competitors tackle 6 obstacles, including the brand new Tilting Slider, Cargo Crossing, and The Swinging Spikes. Returning veterans include Brent Steffensen and Sam Sann, along with season 6 breakout star and fan-favorite Kacy Catanzaro.

Fearless competitors tackle obstacles, including the new Tire Swing and Paddle Boards.

Pittsburgh, PA's historic Carrie Furnace will host the fifth qualifying round where competitors tackle two new obstacles, the Snake Crossing and the Wind Chimes. Returning veterans include Michelle Warnky and "Captain NBC" Jamie Rahn, while Olympian and Pittsburgh local Brianne McLaughlin and Harlem Globetrotter Flip White will take a shot at the course, along with University of Pittsburgh "vampire" professor Joel Brady and Team USA members Joe Moravsky and Elet Hall.

The qualifying rounds continue with a very special all-military cast competing on the pier in San Pedro, California in front of the historic battleship USS Iowa. Competitors, including both active duty and retired military members, will tackle the six stage city qualifying course featuring two never-before-seen obstacles – the Log Runner and the challenging I-Beam Cross. Former Army National Guard Caption and six-time Ninja veteran Ryan Stratis and active Navy Lieutenant Junior Grade Dustin McKinney return for another shot at the course. This round will be the last of the city qualifying rounds before the show heads to the city finals rounds.

The top 30 competitors from the Venice Qualifier tackle the Venice Finals course, which includes such obstacles as the Salmon Ladder, Rumbling Dice, Clear Climb, and Invisible Ladder.

The top 30 competitors from the Kansas City Qualifier tackle the Kansas City Finals course which includes such obstacles as the Salmon Ladder, Flying Shelf Grab, Body Prop, and Invisible Ladder.

The top 30 competitors from the Houston Qualifier tackle the Finals course, which includes the Salmon Ladder, Walking Bar, Crazy Cliffhanger, and Invisible Ladder. Top competitors and fan-favorites Brent Steffensen, Sam Sann, and Daniel Gil.

The top 30 competitors from the Orlando Qualifier tackle the Finals course, which includes the Salmon Ladder, Cannonball Alley, Helix Hang, and Invisible Ladder.

The top 30 competitors from the Pittsburgh Qualifier tackle the Finals course, which includes the Salmon Ladder, Floating Monkey Bars, Door Knob Arch, and Invisible Ladder. Top competitors include Elet Hall, Michael Bernardo, Joe Moravsky, and Michelle Warnky.

The top 30 competitors from the Military Qualifier tackle the Finals course, which includes the Salmon Ladder, Arm Rings, Doorknob Arch, and Spider Climb. Top competitors include Army National Guard Caption Ryan Stratis, active Navy Lieutenant Junior Grade Dustin McKinney, and Coast Guard Aviation Survival Technician Robin Pietschmann.

Re-live the best moments from the season so far during this original, jam-packed special chronicling the best runs of this season.

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The finals continue in Las Vegas, Nevada, where the remaining finalists take on Stage 1. Those that finish move on to Stage 2.

In the last night of the Las Vegas finals, competitors tackle obstacles that include Psycho Chain and Area 51.