Day 5 Courmayeur to Rifugio Bonatti
The TMB is picked up on the road in front of the church, walking up the road the route passes through Villair. Here the road turns into a track and then a path which climbs steeply through woodland bringing you to the Rifugio Bertone (1989m) which allows camping. (On this part of the route some of the signs seem to have been moved or removed). The route continues up along the Mont de la Saxe with great views back up to Col du Seine.
The path continues upwards with a final short steep climb to reach Tete Bernadra (2534m) and then onto Tete de la Tronche (2584m). Dropping down from the ridge to the Col Sapin (2435m) the route traverses along the edge of the mountain before a final climb brings you over the Pas entre deux Sauts to the Vallon de Malara.
Descending the valley brings you to Rifugio Bonatti. There is no camping here although it is possible but probably not legal to camp behind some ruined buildings just before reaching the Rifugio Bonatti. The better option is to continue on to the Hotellerie at Arnuva where camping is allowed.
Day 5 Variant Courmayeur to Rifugio Bonatti
Begin as for the normal route passing up through Villair. Instead of taking the path up to Rifugio Bertone stay on the track which leads you through the Val Sapin to reach Chapy. The path heads of to the left follow this up to reach the Curru the path now continues up to reach the Col Sapin where you join the normal route again.