A tip from Corinne Gourgeonnet: Jean Marc Dumont, a young man of 64 who is also aspiring to do all esfr-markers. He once started as a co-walker along the bordermarkers and now continues on his own with impressive trips on his MTB or by foot.

As a former air traffic controller, he retired at an early age (the ultimate dream of every Frenchman, so it seems) and never regretted that a single moment.
Now he has covered 74% of all esfr-bm’s (using the “parfait” excel-sheet on this page) and he expects to finish next year. That implies that he can well be the first to complete the esfr-bordermarkers after Corinne in 2021 and before Carlos & Conchita Roca, Sébastien Marc and Jérôme Loubière.
So far, only bm425 has given serious problems, getting in rough terrain and in fact in danger.

Special notice: he has his own mini-camper for his bm-outings: the MarKomobile which made me instantaneously jealous.

No blog, no website but you can still follow his adventures and progress on Strava. Good luck Jean Marc and let us know when you are approaching the finish.