Go behind the curtains at this down-obsessed outfitter
Polar Bears International's Geoff York has been studying Arctic wildlife for more than 20 years. In that time he's had some magical moments—and a few close shaves.
Thru-hikes are transformative experiences. Here, five long trail alums share the wisdom of those miles.
Photographer Bart Smith has hiked nearly every mile of every National Scenic and National Historic Trail.