Sporty loop hike that starts and ends at the Grand-St-Bernard pass. From the Hospice, go down 100m on the road on the Swiss side, then turn left and go up towards the Col des Chevaux. Follow the path to the Col du Bastillon, before going down to the Lacs de Fenêtre. The return is then on the other side of the Pointe de Drône, passing through the Fenêtre de Ferret, border with Italy. The Italian section then descends towards the pass road and finally reaches the Swiss border.