About the same number of people have continuously thru-hiked the Grand Canyon as have walked on the moon.
A few dozen more have hiked it in sections. Two of them — author Kevin Fedarko and photographer/filmmaker Pete McBride — are here to tell their tales of hundreds of trail-less miles through the heart of the Grand Canyon and the threats to the canyon they discovered along the way.
Join them in Seattle this February: https://www.seattlesymphony.org/concerttickets/calendar/2017-2018/nat-geo/benaroyahall/between-river-and-rim