Grosseto to Mazara del Vallo trains might be a good value for money solution: travelling in Italy by train is often rather cheap and faster than taking a bus indeed Trains leave from Grosseto and arrive at Mazara del Vallo every about 4 hours on average. If travelling with Trenitalia, you need to know the Grosseto to Mazara del Vallo train schedule: the first train leaves at 18:29, while the last ride is at 20:29. A Grosseto to Mazara del Vallo train cost about 105.5 €. But how long is the train ride from Grosseto to Mazara del Vallo? Your journey takes about 19 hours on average.