It is advisable to follow the markings throughout your hike as well as to carry the FFRandonnée topo-guide. You will also find information on the website my GR.
The marker signs (white/red, yellow and yellow/red) and the acronyms GR® GRP® PR , are registered trademarks of the French Federation of Hiking. They cannot be reproduced without its authorization. The FFRP, recognized as a public utility, gathers associations that create and maintain hiking routes. It publishes topo-guides of these hiking routes.