The ULTRA-TRAIL DU MONT-BLANC ®, a sporting challenge and a human adventure equal to the challenge of rare diseases. Since 2015, the Rare Diseases Foundation is one of the solidarity causes retained by the organization of the Ultra-Trail du Mont-Blanc® (UTMB).
In August 2018, 27 runners took the start of one of the UTMB® races to crisscross the valleys of Mont Blanc in the colors of the Rare Diseases Foundation.
