The trail starts at the “marmots” site and follows a tarmacked road before branching off sharply to the right and reaching a trail along a former canal up to a triangular junction. Take the trail going up to the left to reach the RD 137. Leave the road and follow the steep trail to the left (take the steps in front of you). Walk along the cliff until you see the fortifications (be careful not to take the trails that lead to climbing sites). You will get to flat ground. From here, follow the quite steep trail on the right on the edge of the ramparts to reach a carpark (bus park). Take your time to walk through the fortifications and discover the cultural heritage of Mont-Dauphin and its village where you will find many craftsmen. For the return walk, go back to the bus park and take the trail through the pines at the other end of the carpark (indicated with a yellow PR sign). The trail has large curves and leads to fields. Go down to the left at a junction and take the trail return to the marmots site (you can observe this mammal but DO NOT FEED THEM).
For a panorama option, at the bus park, cross the road towards the lunette d'Arçon (fortified element). Turn left to take the trench made for attacks and then, walk alongside the cliff up to the plateau that gives an exceptional view on the gorges of the Guil.
"HIKING, On foot in the Guillestrois – Great WALKS" - Guidebook sold in tourism offices in the area.
From Guillestre, follow the N94 towards "Briançon". At the roundabout of the N94, turn right to Eygliers station. Park your car in the carpark to the right a few metres from there.
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