Here is KMZ file for Stage 13 Route Map with path/point/distance info.
Stage 13 - Friday, July 15: Miramas - Montpellier, 173.5 km
In between Alps and Pyrenees, its pretty flat stage so some young riders would try one day fame. The finish line is inside Stade de la Mosson - home of Montpellier. The football stadium will be a Velodrome for the day.
I added some path thru the stadium line refering the map below and this one.