Curiosity, with Rory Bosio, Timothy Olson and Hal Koerner

Those who run really long distances, ultra marathons, are all motivated by a particular reason. For Timothy Olson, for example, running saved his life and took him away from drugs and a sinister destiny. For Rory Bosio the key to interpreting her running is the simply joy it gives her. While for Hal Koerner perhaps it's the challenge of doing one competition after the next, that has led him to take part in over 100 ultra races. And even if this video follows these three athletes during the last The North Face Ultra-Trail du Mont Blanc - won by Bosio for the second time -it is certainly dedicated to all those who are curious enough to explore their own limits.