Christophe Dumarest is a French mountaineer and mountain guide, born on February 18, 1980, in Annecy, in the heart of the Northern Alps. Christophe was introduced to the mountains and mountaineering by his parents at a very early age, and climbed his first peak over 4,000 meters before the age of 10. He began high-level mountaineering with the national team of the French Mountaineering and Climbing Federation (FFME), climbing major routes in the Mont Blanc massif from the 2000s onward, then embarking on expeditions around the world: Peru, Norway, Pakistan, Alaska, China, Nepal, Chile, Tibet, and Patagonia. He is particularly distinguished by his alpine sequences and the opening of new routes, particularly in the Alps, on the south face of Mont Blanc, the Grandes Jorasses, and the Freney Pillar. Christophe Dumarest is also recognized for his versatility, combining mountaineering with other activities such as paragliding. He has participated in the production of several films documenting his adventures, including "On the Wire of Friendship," "The Bonatti Way," and "Inside." Alongside his guiding activities, he works as a technical advisor for outdoor equipment brands, a columnist for the specialized press, and a lecturer, sharing his experience and vision of the mountains with companies and the general public. Committed to preserving the mountain environment, in 2020 he co-founded the ACTS FOR OUR SUMMITS association, dedicated to the ecological transition in the mountains. He has also led projects organizing trips for young people in difficulty and participated in communication and social responsibility initiatives for companies in the outdoor sector. On a personal level, Christophe Dumarest lives in Haute-Savoie with his family, his partner Tifenn, and their two children. His life is marked by the search for balance between a devouring passion for the mountains, professional commitment and family life.