Marie Troillet, who teaches in an elementary school, lives in Lourtier. Her brother Florent is also a competition ski mountaineer. 2004: Patrouille des Glaciers 4th, together with Laëtitia Currat and Laëtitia Roux 5th ("seniors I" class ranking), mixed team together with Sophie Dusautoir Bertrand and Rico Elmer 1st, together with Nathalie Etzensperger and Émilie Gex-Fabry Pierra Menta 8th, together with Laëtitia Currat 4th, together with Gabrielle Magnenat 3rd, together with Gabrielle Magnenat.
2004: 1st, World Championship single race ("juniors") 3rd, Trophée des Gastlosen, together with Jeanine Bapst 7th, World Championship vertical race ("seniors" ranking) 9th, World Championship single race ("seniors" ranking) 2005: 1st, European Championship single race ("juniors") 1st, Swiss Cup team (together with Laëtitia Currat) 8th, World Championship single race ("seniors" ranking) 9th, World Championship vertical race ("seniors" ranking) 2006: 1st, World Cup ("juniors") 2nd, Trophée des Gastlosen, together with Andréa Zimmermann 2007: 6th, European Championship team race (together with Gabrielle Magnenat) 9th, European Championship combination ranking 2008: 1st, World Championship relay race (together with Gabrielle Magnenat, Nathalie Etzensperger and Séverine Pont-Combe) 2010: 2nd, World Championship relay race (together with Gabrielle Magnenat and Nathalie Etzensperger) 2nd, World Championship team race (together with Nathalie Etzensperger) 10th, World Championship single race 2011: 1st, World Championship team race (together with Nathalie Etzensperger) 4th, World Championship single race 10th, World Championship vertical, combined ranking 2012: 1st, European Championship team, together with Séverine Pont-Combe 4th, European Championship single 2nd, Patrouille de la Maya, together with Nathalie Etzensperger and Gabrielle Gachet, née Magnenat 2000: 1st, (short course) together with Stephanie May and Melanie Fellay 2004: 1st, (short course) together with Laëtitia Currat and Annick Rey 2006: 4th, together with Laëtitia Currat and Laëtitia Roux 2008: 5th ("seniors I" class ranking), mixed team together with Sophie Dusautoir Bertrand and Rico Elmer 2010: 1st, together with Nathalie Etzensperger and Émilie Gex-Fabry 2008: 8th, together with Laëtitia Currat 2010: 4th, together with Gabrielle Magnenat 2011: 3rd, together with Gabrielle Magnenat.
She started ski mountaineering in 2000 and has been member of the national team since 2004 as well as member of the Dynafit-Team since 2005.