From Epinal go via the D166 direction Mirecourt.
Just before Mirecourt turn right onto the D10 direction Villers.
And near to Villers turn left onto the D17 direction Gircourt-lés-Viéville.
This is a scenic route, about one car wide.
After ca. 5km the D17E comes together with this road from the right.
Beware. You need now the first road to the left, it is opposite a farm at the right. On this track take the first to the left and it brings you to the beacon.