Storyline
The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Cast & Crew
BF
Bill Formanek
Self
Lead
Todd Martin
Self
DN
Dave Nally
Self
RR
Rich Rudow
Self
GS
Guy Smith
Self
What People Are Saying
4.0
“A staggering achievement of craft and ambition. Dan Ransom's vision lands with breathtaking precision.”
4.0
“Every frame feels alive. Last of the Great Unknown is the rare release that takes its audience seriously.”
