George Graybill is an experienced outdoors writer and backpacker who set the age record for hiking the 210-mile John Muir Trail at age 80. His articles on wilderness and adventure have appeared in Backpacker, Wired for Adventure, and Trail Groove magazines. Earlier in life, he worked as a research chemist, oceanographer, toymaker, furniture designer, science teacher, and chicken farmer. He has a PhD from the University of Hawaii. Graybill lives in Aptos, California, where he works as a freelance science and outdoors writer. More information can be found on YouTube.