Yosemite Climbing Pioneers in "The Big Walls"

Pioneers of Yosemite climbing in the 1960s—Royal Robbins, Yvon Chouinard, Steve Roper, and Chuck Prat—are featured in this bonus clip to the feature documentary Valley Uprising by Sender Films. The special clip showcases the film's unique graphical treatments and interviews with the legendary climbers.

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