リュサのおすすめウォーキング＆ハイキングルート

The path was lost for me when I was about to cross back, found again thanks to a cairn (thanks) then lost again a little further up. The GPS is struggling. Quite a few brambles to get out of the canyon on the Lussas side.

sometimes difficult to follow the route but very pleasant to walk in the (dry) river bed

No difficulty or difference in altitude, very nice!

Nice hike taking the path that runs along the canyon above. Nice view

Warning ⚠️: lost path going down into the gorges after Sevenier. GPS in the cabbages, path eaten by vegetation, landslide,.... ??? We had to turn back

You are not in the canyon as suggested by the fist foto. You have a panoramic view on the canyon from above

Sources: https://www.pop.culture.gouv.fr/notice/merimee/PA00116726 "Gallic oppidum of the barred spur type, dominating the Ardèche. On the accessible side, it is defended by a monumental wall presenting three stages of construction. The first is represented by a rectilinear dry stone wall, pierced by a cart door which delimits a four-hectare oppidum, dated 130 AC Then, the enlargement of the oppidum results in a massive work punctuated by square towers involved in the work. An external clavicula, usually found in Roman camps and serving as the forward defense of the gate, and the use of mortar to bind the core are seen in this second phase dating back to around 80 AC. Finally, a third phase, around 50 AC, doubles this construction of overhanging towers, alternately round and square. This last state uses mortar more widely for facings and towers. At the rear of these fortifications is perceptible a habitat composed of houses of different sizes interspersed by a network of roads. This site is undoubtedly the former administrative center of the city of the Helvians, before the creation of Alba Helviorum."

This canyon is quite spectacular in its presentation. Its layers of rock are visible to all, revealed by the water of the Louyre stream for thousands of years.