Walk from the Refuge Carducci to the nearby Giralba pass and ten meters after the first corner turn right and walk until you reach the path n. 101. Continue up to the pass 11 for about 3 hrs. Easy enough route but always bring with you the via ferrata equipment. The second part up to the Sentinella pass is a little more demanding. With snow and ice we recommend crampons and ax. Journey times from the Carducci refuge to the R. Berti, about 6hrs30. 30min more to reach the R. Lunelli.