The Monte Amiata area offers an extensive calendar of chestnut festivals. The oldest is the Crastatone, filled with music and dancing in the streets, when visitors can relive the atmosphere of an authentic rural village. The festival takes place within the town’s medieval city walls, the Rocca Aldobrandesca, which encircle the historic centre. Food stalls are set up in the streets and alleyways, serving food made from chestnuts. More info (in Italian) here.
Vivo d’Orcia celebrates the mushrooms and chestnuts on the second and third weekends in October, with a multitude of specialties made using local mushrooms. You can expect to see many food markets and mushrooms exhibitions at the festival.
Every year, the medieval town of Abbadia San Salvatore hosts the Autumn festival: an entertaining exposition of local artists and kiosks selling traditional homemade dishes. You can also join guided walks through the woods looking for mushrooms and chestnuts. For more information about autumn festivals in the Monte Amiata area, see www.amiatautunno.it.