Do the riders cross any cobble sections used in Paris Roubaix as they head toward Saint Quentin? If they are do you know the locations of the sections? I am going to be there in early July and this is my could be my first chance to see them race over cobble stones.

Thank you!

Here is a km by km routing for the stage. Perhaps with a Michelin map you could find out.
http://www.letour.fr/2006/TDF/presentation/us/400/horaire.html