Watch VoirFilms. In October 2010, two of France's top mountaineers, Christophe Dumarest and Yann Borgnet, fulfilled a mountaineer's dream: a six-day alpine-style ascent of Walter Bonatti's great routes through the Mont Blanc massif. Dumarest and Borgnet first climbed the north face of the Grandes Jorasses; they then climbed the Grand Capucin and the Pilier Rouge du Brouillard, completing their feat with the ascent of Mont Blanc. Their paragliding descent in Chamonix completes their feat with a touch of fun. The climbers and the director made the ethical choice not to use helicopters to shoot the film.