Eric Ryback hiked the entire Appalachian Trail in 1969 when he was only 17 years old. The next summer he was the first person to hike the Pacific Crest Trail, 2500 miles from Canada to Mexico. He did it in 132 days carrying an 80 pound pack. Two years later he became the first person to complete backpacking's "triple crown" by hiking 3,000 miles along the Continental Divide, approximating a route that now makes up the Continental Divide Trail. He wrote a book (above), had a bunch of articles written about him, tasted a little celebrity, then hung up his boots and reemerged in the 90s as a one of the nation's most accomplished mutual fund managers. Makes sense.A few pictures from his PCT hike can be found here.