The mountains return for a mid-week contest to the Apennines on stage 11, which sets up opportunities for breakaways and a re-ordering of the general classification. The 185km route has two distinct parts, with the start from Viareggio gradually rolling north for 79km and then punching to 1,397 metres in elevation on the 9km climb of the Alpe San Pellegrino. The climb finishes about 1.5 km past the village and features gradients around 20%, which is the toughest section of the entire 2025 Giro.
Then the second half of the race is filled with twisting descents and elevation changes into Castelnovo ne’ Monti. It begins at kilometre 93 with a long, winding descent through the woods of the Apennines. There are a pair of category 2 climbs, first at Toano and then Pietra di Bismantova, with the road rolling across a final 5km to the finish at Castelnovo ne' Monti.
