+1 for it being an underrated area (to us tourists, anyway). We did 1 night there on the way back from the Alps to Belgium and rode a nice circuit with Grand Ballon/Markstein. Stopped off at a mountain top war memorial/museum (Vieil Armand) which was quite impressive too.
We chose the route after reading Mountain Higher, and bizarrely the picture we took (months after doing the research) was of the exact same milestone they’d used in the book 😯
(the Chien Perdu reference is to me rescuing a dog that had done a runner from a camper van leaving the owner hysterical, it’s not another must-do climb!).