We were now moving steadily towards the Chevreuse valley with about 60 km to go .
We were now facing riders who had ridden already for more than 12 hours was first of all the killing climb out of Dourdan ( 504 km ) .
We were now moving steadily towards the Chevreuse valley with about 60 km to go , and facing riders who had ridden already for more than 12 hours was first of all the killing climb out of Dourdan ( 504 km ) .