The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Director:
Bill Formanek
Self
Todd Martin
Dave Nally
Rich Rudow
Guy Smith
Oct 3, 2006
Apr 21, 1938
Jun 2, 1938
Sep 27, 1968
Jan 4, 2023
Aug 1, 2002
Jun 16, 2017
Nov 16, 2016
Apr 28, 2022
May 28, 2008
Feb 10, 2008
Jul 1, 2021
Oct 28, 2016
May 30, 2014
Sep 1, 2006
May 24, 2006
Jan 1, 2018
May 16, 2008
Jan 15, 2011
Feb 7, 2017
Feb 7, 2010
Nov 26, 2009
Aug 14, 2014
Feb 7, 2006
Feb 20, 2015
Mar 21, 2013
Jan 31, 2018
Dec 4, 2010
Jun 13, 2003
Feb 24, 2016
Sep 12, 2013
Nov 5, 2016
Aug 28, 1992
Dec 18, 2009
Sep 9, 2006
Apr 21, 2010
Apr 2, 2004
Jun 3, 2006
Oct 17, 2012
Dec 17, 2015
