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Ueli Steck may be the greatest speed alpinist the world has ever seen. In this film he tells the stories of his record-breaking ascents in the Alps, accompanied by stunning aerial footage of him racing up 8,000 foot alpine faces. Ueli joins Alex Honnold in Yosemite to attempt speed records there. His ultimate goal: take his one-man alpine speed game to the largest, highest walls in the world.

Behind every breakthrough in the progression of climbing, there's a true story of doubt and determination, perseverance in the face of failure. From boulders, to big walls, to competition podiums, the climbers at the top of the game share an unending commitment to achieve their vision.

Peter Croft and Lisa Rands attempt a wild free ascent on the Incredible Hulk Wall in the Sierras -- arguably America's best (and least filmed) alpine rock wall. Croft, the most legendary of California's crack masters mentors the renowned boulderer Rands as she explores into alpine traditional climbing terrain.

Daniel Woods and Paul Robinson compete to climb the hardest boulders ever scaled. An inside look at what it takes to push the difficulty envelope of this intense sport.