Geotrek becomes an essential tool for soft multi-day trekking. The Écrins national park uses it within the context of the creation of Grand Tour des Écrins. This website comes with a mobile application, available on Android and iOS. Eco-tourist routes of Grand Tour des Écrins are addressing sportsmen as as famlies. Six multi-day treks are actually available on the website to discover the protected spaces of the highest Alpes du Sud massifs, in addition of more than one hundred of treks already available on Rando Ecrins, dedicated to daily trekking in the national park.