How the ultra marathon around Mont Blanc turned trail running into a mega sport Twenty years ago, a small band a runners came up with an idea: hold a race around the Alps' highest peak, covering more than 100 miles through Italy, France and Switzerland. They expected a few crazy souls. Instead more than 700 runners showed up. Running was changed forever. This is the improbable story of how Ultra-Trail du Mont-Blanc (UTMB) became one of the world's...