Wear comfortable walking shoes. If you are walking on Sunday, there are no stores or restaurants open along the route. Maps or a cellphone with GPS.
In France it is legal to walk on the dividers between crops. You are obviously not allowed to enter any planted areas. Two IGN maps will help you to choose your route. Most useful is the one for Sours 0. You may also want the one for Chartres 0. The tourist office can help you find a bookstore in Chartres. From there you can walk along the road D to Le Coudray and pick up the walking path beside the Eure River. Some have told us they find this route a bit harrowing because of the need to walk on the shoulder of a busy road.
Berch-Pierres has been working on an alternative and more historically accurate route which I hope will be posted on their website eventually. You will enter into a wooded area.
After about meters you will see a moto-cross track on your right. One the left you will see signs that will guide you to the walking paths through the quarry.
Jacques the Camino which leads between Chartres and Compostela, Spain. There are shell markers which show this connection. You may want to walk to the quarry and back to Chartres, or you can bike there.
