Arriving in Le Grazie, follow the road on the right that heads towards Casole d’Elsa. After 100m, head left on the ring road, which will take you out of Colle Val d’Elsa. Once on the S.S. 421, at the second roundabout, turn right towards Follonica, cycling on level ground for around 1.5km. At the junction after the bridge in San Marziale, turn left, doubling back on yourself and, after 300m, head uphill until you reach the intersection with the S.P. 5 which heads to Monteriggioni. Here, you will leave the River Elsa valley, cycling towards the River Staggia valley. Once you’re in close proximity to the castle, take the S.S. 2 Cassia towards Poggibonsi, a 13km cycle from here.