Park in the car park at the top of the main street in Coisia, where there are a few spaces available.
You can also park further south in the village
(S/E). Walk back down and take Rue du Centre on the left. At the next crossroads, turn left onto Chemin de la Chandelette.
(1) At the first three-way junction, turn right.
(2) At the next intersection, take the path on the left. Stay on this path heading north.
(3) At a fork, go left and continue north. Pass a spring and continue north (path not shown on the IGN map but present on the OSM map).
(4) At the crossroads, turn left and head west-southwest, then southwest.
(5) At the crossroads, at a place called Au-dessus des Puits, turn right (north) onto a good path.
(6) At the next crossroads, take a recent path on the right, marked in yellow. Wind your way through the woods for a long time, heading generally north-east (beautiful views of Lake Coiselet). The path makes a big turn to the left, then one to the right, finally leading to a wide white path.
(7) Follow this white path to the right and you will reach the Pic d'Oliferne car park.
(8) Climb up to the left (signpost indicating the direction of Molard de Justice). When the path turns right, leave it and take a path that climbs straight ahead. At the next fork, turn left and climb up to the ridge.
(9) Then turn left (south-southwest) and follow the gentler uphill ridge. Pass by a few viewpoints.
(10) At the last viewpoint, leave the ridge by heading left. Shortly afterwards, take the dirt track on the right and follow it to the next intersection.
(11) Turn left onto a path and continue east, ignoring the paths branching off to the sides.
(5) Back at Au-dessus-des-Puits, turn right (south) to climb up to Oliferne Castle.
(12) Walk around the site (the route is clockwise). There are numerous information panels along the castle route. Climb up the low wall to reach the platform with the castle ruins. Go to the end to admire the view of the Ain, read the information panels and discover the legends. Return via the ruins. Gradually descend.
(12) Retrace your steps to the Au-dessus-des-Puits crossroads.
(5) Then turn right and retrace your steps to return to the Coisia car park (A/D).
