20109710 Just the 6500m of climbing then (1800m more than the Elenith, 2500m more than The Dean).
It's OK, the French can do it even bigger: Le Tour Du Mont BlancĀ® Cyclo. 8000m climb in 330km.
It's not very clear about the time limits, but "From midday, all the participants will be invited to make half-turn at Martigny and go back to the Saisies (withdrawal)." suggests you're expected to do ~150km in 7 hours. Ouch.