It consists of walking for several days or several weeks and being entirely or partially self-sufficient. Originally, the sport was mainly practised in mountains, often in famously inaccessible locations; however, today the term extends to other types of terrain and itineraries for all levels. The spirit of trekking is all about setting up your bivouac at dusk, taking the time to look at the stars and discovering new landscapes every day. You decide on the setting: the vastness of the desert, the town or countryside, the beauty of the mountains etc.