Col di Nanna e col Portola
Departing from Gressoney Sant Jean, climb up the road to Staffal. From there by lifts to the Bettaforca pass. Descent on dirt road to Frachey. Continue to Saint Jacque and cross the river on the left, heading for the Tournalin refuge. A challenging, mostly pushing trail starts from the refuge to the Nanna col. Very beautiful and scenic descent to Chamois.
When you come to a dirt road, turn left toward the Champlong lakes. You take up a single track with some high steps, pushing for a while, to the col, from where there is a spectacular 360-degree panoramic view. You pass near the summit Monte Tatane and resume the small road toward the Col di Portola. You turn onto single track before the col from where there is a spectacular view of the Ayas Valley.
The first part of the descent is very technical and then slowly more and more cyclable until you cross Ru Courtoud. We.follow it to the end, on the flat section we take the last fun single track to Frachey. We take the lifts again to the Bettaforca pass and final descent to Gressoney Saint Jean.
Challenging but very very beautiful and scenic tour.