In Valley Uprising, a Boulder Filmmaker Explores Yosemite’s Climbing Counterculture
In 2007, Sender Films began shooting interviews with rock climbers for a then-unnamed documentary about Yosemite National Park. At the time, the Boulder-based production house was already well-established as climbing filmmakers go, with four full-length movies and innumerable shorts to its credit. (It’s since added two more features and a…