La Marmotte

La Marmotte is one of the toughest amateur sportives in the world. The 174 km route starts in Bourg d'Oisans and takes on four legendary Alpine climbs: Col du Glandon, Col du Télégraphe, Col du Galibier (2,642 m) and the iconic 21 hairpins of Alpe d'Huez to finish. With 5,180 m of climbing, this is a day that will test every fiber of your being. The key challenge is managing your effort across the entire day. Many riders blow up on the Galibier because they went too hard on the earlier climbs. You need exceptional climbing endurance, the discipline to hold back early, and enough reserves to tackle Alpe d'Huez after 150 km of riding. Altitude plays a factor too — the Galibier summit sits above 2,600 m where the air is thin. Training should emphasize long climbing days with 3,000-4,000 m of elevation gain. Practice stacking climbs back-to-back to simulate the fatigue of the later mountains. Threshold and sweet spot work on 20-40 minute climbs will build the specific fitness you need. Include at least one training block with altitude exposure if possible, and rehearse your nutrition strategy for 7+ hours of sustained effort.