LE BALZE TRAIL RUN, first edition. A competitive trail running race of 17.6 km with an elevation gain of 650 meters. An eco-walk of 5 km is also offered. The race starts at 9:00 AM. The meeting point is at 7:30 AM in Piazza Vittorio Emanuele II, Castelfranco di Sopra, Municipality of Castelfranco Piandiscò (AR). Participants can visit the Balze of the Upper Valdarno.