Here is KMZ file for Stage 19 Route Map with path/point/distance info.
Stage 19 - Friday, July 22: Issoire - Le Puy-en-Velay, 153.5 km
So this stage would be for riders who want a one day fame. Sprinters would also try to cash in some more points, but small hills after hills are tricky. Next day will be invidivual time trial, so contenders will save some power in anyway...
Couldn't find any geotagged flickr photo around this stage route, so pls post some if anybody watched and the race in person...
The route path is slightly modified around the finish line in Le Puy-en-Velay, refering this map from J SPORT: