Bertone to Bonatti via Mont de la Saxe

Start out steeply uphill past rifugio Bertone, and in about 10 minutes you’ll reach a fork in the trail just as you crest the ridge.  (Stop and enjoy the views).
Branch to the right, continuing uphill another hour to gain the crest of the Mont de la Saxe ridge.
The view across the Val Ferret to Mont Blanc and the Grandes Jorasses is simply stunning. If you’ve brought your own lunch, this would be a good place to stop and admire the view during an unhurried meal. Mountain panoramas don’t get much better...
There are often quite a few cows, and cow patties, up here.  Enjoy the views but also watch your step.
Continuing on, the trail leads up again to Tête de Bernarde, drops very steeply on slippery gravel to the pass Col du Sapin. The trail is very gritty and slippery for a few minutes.  Slow down and be safe.
At Col Sapin, turn left (signposted for Arminaz) into a small hanging valley. 
Continue across the valley, crossing one more short pass called Pas entre deux Sauts, to bring you into the Malatra valley.
Turn left, heading down the valley, passing a couple of old farm buildings, and finally you’ll arrive to the rifugio Bonatti. 
This is a 4 hour trail, but replacing the 1½-2 hr normal route, it should add 2-2½ hrs to your hiking day.