It is one of the most famous walks developing in Gran Bosco Park, leading to the sunny mountain huts of Seu in about 1 hour and 30 minutes (4.5 km).
Along the road leading to Col Blegier, after the short uphill stretch you will find after the junction leading to Randuin summer mountain pasture, you will find the junction leading to Montagne Seu, where a memorial stone says: "Strada boschiva del Seu costruita dall'Isp. For. Dott. Vitale nell'anno 1926" (forest road of Seu laid down by Isp. For. Dott. Vitale in 1926). Therefore, Salbertrand was connected with Seu by a carriage road only in 1926, as an alternative to the steep mule track used until the new road was open (today GTA).
The road develops almost on a flat ground for 3 km at an altitude of 1,800 meters and represents an easy route for hiking in every season, not only on foot but also by bike, with skis or snow rackets (during the winter, the snowmobile is occasionally used).
Before reaching the houses of Seu, a road branches off on the right: it leads to the summer mountain pasture of Selle and to the beginning of trail no. 7 "Gran Bosco Mule Track".