A masterful account of the rise of trail running, in the first person, by a journalist from the Guardian. Adharanand Finn, author of a remarkable survey on Kenyan marathon runners, runs his first trail for a report. Two years later, he is at the start of the mythical UTMB. Along the way, he will have met the greatest champions of endurance racing, exploring the motivations of these enthusiasts... and especially his own.