4th stage of the Piemonte Gravel. Two routes, open to all types of bike (gravel, mtb, e-bike, etc.) - short of 39 km and long of 66 km -, to discover the nature of the Ivrea Morainic Amphitheatre on dirt roads, the Via Francigena, vineyards, castles and more. Departure and arrival from Albiano d'Ivrea.