steady run 4:30:00 
Source du Doubs to Chalet Gaillard Beautiful clear sunny morning :-) only downside was some black ice on tracks and roads early before sun got to them, but we managed to avoid any spills.
11km along a valley W some small climbs then a bigger climb to pass largely on snowy paths. Met pisted trails at high point and teetered along the edge trying to avoid skiers eyes in case they told us off! Descended to to Chapelle des Bois and had lunch ( and saw some biathlon on thE TV (Norway won, yawn yawn)
Then big climb up scarpslope(fixes rope at one point!). Then6km of undulating snowy track to Chalet Gaillardia. Got ther at 3-30, almost a half day:-).
Afternoon beer then 4 course hit meal and a night of sweaty mattresses and other people stomping past to the loo.
Feeling tired but not destroyed, maybe survive the trip after all:-)
28.5km - hardly worth getting out of bed for:-)