Pont-Saint-Martin - Staffal

The Lys Valley, also known as the Gressoney Valley, is the longest side valley of the Aosta Valley, offering about 38 km of ascent with 1,500 meters in altitude.
The route alternates between steeper sections and stretches where you can catch your breath. On holidays, the road can be quite busy with cars.
Along the way, you can admire many unique corners of the valley, including bridges, castles, churches, and much more.

From the Pont-Saint-Martin motorway exit, turn right toward Turin.
At the second roundabout, turn left toward Gressoney.
About halfway up the hill, on the right-hand side, you will find the large car park near the library.

From the car park, climb to the right, passing the junction for Gressoney, and make a short stop in the square for a souvenir photo with the Roman bridge. From the square, return and then turn left into the Lys Valley.
Continue until you reach Tour d’Hérèraz, after which the route levels out for a few kilometres. Continue through Lillianes and Fontainemore (worth admiring on the left are the church and its stone arch bridge) before reaching Issime, where on the right you can see the church with its Last Judgment fresco on the façade.
Proceed past Gaby, then tackle the steep section of Pont Trenta before reaching the open plain of Gressoney-Saint-Jean, where the route flattens again. Pass near the elegant Villa Margherita and continue across the long plateau.
Finally, a steeper climb brings you to Gressoney-La-Trinité, and with one last ascent you reach Staffal, where the road ends.