Growing up in a hut in the Spanish Pyrenees, the mountains have always been his playground whether running, climbing or skiing. As a multi-disciplinary athlete, he also holds speed records in mountains around the world, including a double ascent to Mount Everest.

Nowadays, Kilian lives in Norway where he continues to explore his limits in mountain sports and to inspire a large community with movies, books and digital content. Kilian has also become a climate advocate working to raise awareness about environmental protection.