In August 2011, adventurer mountaineer Lionel Daudet - says Dod - left for an “exact” Tour de France: without motorized means, following as closely, "one foot in each country", the land border and coastline. Alone or with friends, he went every day in search of the hexagonal watermark, paddling, climbing, walking, pedaling... This extravagant odyssey, "the Dodtour", is dotted with numerous meetings, and a great caravan results over the months. After 465 days Dod is back at his starting point, the summit of Mont Blanc.