Looking at riding from Courmayeur to Ferret as part of a 'Tour du Mont Blanc'.
The walking route seems to have three variants, either Val Sapin or to Refuge Bertone and then either along Mont de la Saxe or round it into the Val Ferret.
The MTB few routes I've found on the web though all go up the road via Planpincieux and La Vachey. Even Sian and Carl from 'Endless' in Morzine (way better riders than me) look to have gone up the road.
Now I understand that all the offroad routes will have more climb than the road along the valley but climbing (and descending) is sort of what the TMB's about to me. There's nothing in the route guides that suggests that they're particularly rough sections of the walk.
So…. can anyone cast any light on why the bike routes tend to avoid the main TMB route(s) for this bit?