Walk through the Grotte du Déroc and visit the Grotte du Louoi (Accessible between April 15th and November 1st)

Pay attention! This is not a standard walk! This walk includes a 350 meter long cave. You should not be afraid of crawling on your knees through a narrow passage.
You must also be agile. In particular, the descent after the visit to both caves is not a standard walking path but a steep rocky path where a tree is often a nice aid to support.

A rough sketch of the route through the Grotte du Déroc has been added under "Route information".

This walk can only be made between April 15 and November 1 due to the breeding season of the bats.
Do not go out during or after a rain shower. Also do not go out at a high water level. Don't forget a flashlight!
The passage through the Ibie is not accessible at high tide.
With children you have to pay extra attention during the descent.

A straight line is drawn in the route map between the entrance and the exit of the Grotte du Déroc. There is no GPS coverage here. The walk through the cave is flat and mainly straight forward.

You can park your car near the starting point. If you are staying at the campsites Le Vieux Vallon, Ardechois or Rives d'Arc, you can walk from the campsite to the Old Bridge over the Ibie river and use it as a starting point.

Route information:
750m Take the path up to the right
1000m Entrance Grotte du Déroc (low passage and then left around the corner a slightly lower passage, followed by a flat walk in a surprisingly spacious cave)
1300m Exit Grotte du Déroc
1350m Entrance / Exit Grotte du Louoi (the entrance is also the exit, the cave is about 250 meters deep)
1350m Start of the descent
1800m End of descent (left back to starting point or follow route through the dry river Ibie)
1900m Dry river Ibie
2100m Climb out of the Ibie and follow the footpath next to the Ibie
2800m old bridge over the Ibie

That was an adventure to remember!