The challenge consists of completing an Ironman-distance triathlon:
Immerse yourself in the heart of the Summum Challenge, a unique experience that redefines the limits of what is possible. Designed by Cyril Blanchard, this extreme triathlon brings together endurance enthusiasts ready to tackle one of the most demanding courses in the world. Much more than just a sporting endeavor, it is a total human adventure, a journey where the mind and body are put to the test at every moment.
From Lake Annecy to the peaks of Mont Blanc, via the winding roads of the Alps, each stage of the Summum is an invitation to push yourself to the limit. Inspired by the most legendary endurance races, this event is for those seeking an extraordinary sporting experience combining intensity, excitement, and pushing yourself beyond your limits.
The Summum is not just a triathlon: it is a life challenge, an inner and physical quest on a par with the greatest endurance feats in Europe.
If you dream of pushing your limits and conquering your summit, this challenge is for you.
One in particular is imminent: the Summum project in the Chamonix Valley. This challenge was devised by Cyril Blanchard, the French Enduroman record holder. It involves swimming 3.8 km in Lake Coiselet, cycling 188 km with 3,200 m of elevation gain, then climbing Mont Blanc, first with a trail run to the Nid-d'Aigle refuge where a guide will be waiting at an altitude of 2,300 m, before tackling the final ascent to reach 4,810 m. "I already did it in 2024 in 25 hours and 30 minutes, and I'd like to shave off two or three hours," he admits. "I love climbing Mont Blanc, it's a real inner battle."
Tristan Goulwenn
Very happy (and proud!) to have completed SUMMUM An extreme triathlon inspired by Ironman, with the running stage consisting of a single climb up Mont Blanc ♂️ Swimming (4k) + cycling (180k 3200d+) + summit of Mont Blanc = 21 hours and 12 minutes of non-stop effort. Currently the best reference time. An extraordinary adventure, a total challenge. Thank you to Cyril for his support!!
Julien Deneyer
I crossed the finish line of this Ironman... at an altitude of 4,808 meters, after 24.5 hours of struggle. The Défi Summum was undoubtedly the toughest sporting challenge of my life. It was a chance to redeem myself... and the mountain, after my accident. A bike course worthy of a mountain stage of the Tour de France—let's be honest, the record was unattainable for me. Sudden changes in temperature: from the solar furnace of the valleys to the biting cold of the high mountains. The altitude slowing down every step, every breath. Fatigue that builds up after 228 km and 7,000 m of elevation gain. And yet... although the bike reminded me of my limits, it seems that I still managed to set the record for the final ascent to the summit of Mont Blanc. One thing is certain: you never reach the summit alone. So: Thank you to Cyril Blanchard, creator of the event, whose coaching and mental preparation enabled me to hold on after my fall into a crevasse.
Arnaud Naudan