William Bon Mardion (born October 4, 1983) is a French ski mountaineer.
Bon Mardion was born and lives in Arêches where he is member of the Club Multisports Arêches-Beaufort . He started ski mountaineering in 1998. He competed first as a member of the "Espoirs" team at the Pierra Menta race in the same year and has been member of the national team since 2006.
2005: 10th, European Championship single race 2007: 2nd, European Championship team race (together with Alexandre Pellicier ) 2nd, European Championship combination ranking 3rd, European Championship single race 2008: 4th, World Championship team race (together with Grégory Gachet ) 2010: 3rd, World Championship relay race (together with Didier Blanc , Florent Perrier and Grégory Gachet) 4th, World Championship team race (together with Alexandre Pellicier) 8th, World Championship single race 9th, World Championship combination ranking 2011: 2nd, World Championship single race 2nd, World Championship vertical, combined ranking 3rd, World Championship vertical race 3rd, World Championship team race (together with Didier Blanc) 3rd, World Championship relay, together with Didier Blanc, Xavier Gachet and Yannick Buffet 2012: 1st, European Championship single 2nd, European Championship relay, together with Alexis Sévennec-Verdier, Valentin Favre and Yannick Buffet 5th, World Championship vertical, combined ranking 6th, European Championship vertical race 7th, European Championship sprint 2007: 4th, together with Vincent Meilleur 2008: 4th, together with Grégory Gachet 2009: 7th, together with Nicolas Bonnet 2010: 2nd, together with Florent Perrier 2011: 4th, together with Martin Anthamatten 2012: 3rd, together with Pietro Lanfranchi 2013: 1st, together with Mathéo Jacquemoud 2011: 1st, together with Kílian Jornet Burgada and Didier Blanc 
