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Welcome to the wildest competition known to man -- the speed record on the Nose route of El Capitan. Yosemite legends Dean Potter and Hans Florine go head-to-head, racing up 3,000 feet of vertical rock in under three hours, risking life and limb.
'Sketchy' Andy Lewis takes the fledgling sport of slack-lining to new heights, performing aerial tricks like back-flips, BASEjumping off the line and even soloing highlines naked.
Chris Sharma, the "king" of sport climbing battles with Czech wunderkind, Adam Ondra, to make the first ascent of the world's most difficult climb.
Conrad Anker, Jimmy Chin and Renan Ozturk ascend Northern India's Meru Shark Fin, one of the last great unclimbed alpine rock walls in the world.