Chamonix Mont-Blanc, Auvergne-Rhône-Alpes (France) - "Marathon du Mont Blanc". Every year, the Mont-Blanc Marathon welcomes 10,000 runners coming to the Chamonix Valley for a weekend. Eight races of varying formats and difficulties are proposed from 25 to 28 June 2025. Amongst these, mythical events will take place such as the 42km, which brings together the world's best runners, or the 90km, recognised as one of the most technical trails in France. The 23km, whose course has hardly changed since its creation, will take runners through unique landscapes with a spectacular finish at an altitude of 2048m. Other more unusual race formats such as the Duo Etoile, the Vertical Kilometer or the Young Race are waiting to challenge you. Beginners will also be able to discover the joys of trail running with a 10km loop and the little ones will be able to imitate their parents on the mini-cross with distances varying from 800m to 3km depending on their age. www.marathonmontblanc.fr