The Soft Explorer 

The Fontainebleau forest is one of the most, if not the most, beautiful natural areas near Paris. Located in the Île-de-France region, the forest stretches across 25,000 hectares. It is easily accessible from Paris via the R train line departing from Paris Gare de Lyon. Since it is located in the Île-de-France region, it is accessible with your Navigo train pass, making it super affordable. Alternatively, parking is available at many forest entry points if you prefer to go by