Mathilde Sipos brings together 180,000 people on Instagram around her passion for the outdoors. "I started making videos to share my happiness at being outside, discovering myself in another environment, going beyond my limits," she says. Mathilde Sipos gives us hiking tips. Learning to read the weather: "understanding the mountain environment" "When you don't live in the mountains, or at altitude, you don't necessarily realize. Image: Mathilde Sipos