Vallée Chaude
I guess most visitors of Fontainebleau haven't heard about it? It's a remote outspread area with only a dozen opened boulders. The opened boulders are mostly looking fantastic. There are definitely some gems in this area. The area has mostly over 6C's and all the way to high end 7's.
Usually, each boulder has at least one, many times more really good lines. And you can find some classic Jo Montchaussé traverses also.

Most boulders are clearly visible from the paths.

You can park either close to Les 17 virages or walk in from the parking next to Guichot. Some boulders are just next to Le 111 and close by to Rocher Fin. Some are really close to the A6 motorway.