Karen Berger is the author of 13 other books on hiking. She has hiked more than 18,000 miles all over the world, including thru-hikes of the Triple Crown trails (the AT, PCT, and CDT). She is publisher and editor of the award-winning travel websitebuckettripper.com. Photographer Bart Smith is the first person to walk all 11 national scenic trails and 19 national historic trails--over 35,000 miles of America’s landscape. He is the sole photographer of 10 books showcasing America’s national trails. Together, Ken Burns and Dayton Duncan have created some of the most acclaimed historical documentaries ever made. The Partnership for the National Trails System (PNTS) connects trail organizations and federal agency partners to further the protection, completion, and stewardship of the 19 National Historic and 11 National Scenic Trails, within the National Trails System.