The Sbrinz Route is back. Every summer, a group of mountain and animal enthusiasts embark on a journey through time. They slip into the role of their ancestors and follow the oldest cheese trade route from central Switzerland to Italy. is back. Every summer, a group of mountain and animal enthusiasts embark on a journey through time. They slip into the role of their ancestors and follow the oldest cheese trade route from central Switzerland to Italy. In seven days, the caravan with horses, mules, and donkeys crosses the Alps. Near the border between Valais and Italy, it passes the Gries Lake. In the background is the Gries Glacier.