From P2 of Apremont, follow La Route des Gorges d'Apremont to East till you cross the blue Denecourt (around 800m), go left on this blue 6-6 for approximately 200m which stays on the top of the crest, and as soon it goes down or maybe 80m before crossing the other blue Denecourt path n°6, go right for another 100m on the right hill to find the plaque boulder, facing South.