Coming from Siena
Take the Superstrada S.S. 223 for Grosseto and leave the highway (after 24.5 km) at the exit Terme di Petriolo. Follow signs to the Terme and after 4 km, having passed the Thermal Baths, turn left (at the sign Il Poggiale). Continue for another 2.5 km until you reach the Poggiale (entrance gates on your left).
Coming from Grosseto
Take the Superstrada S.S. 223 for Siena and leave the highway at km.38 in the direction of Pari-Terme di Petriolo (this is the old S.S. 223); continue for about 5 km (leaving behind you 2 signs for Pari) turn right (at the sign Il Poggiale) and continue for another 2.5 km until you reach the Poggiale (entrance gates on your left).