The crag can be seen from the Autoroute, there are some big buttresses, and many boulders lower down the slope. The rock is not the best quality granite with some embedded smooth volcanic rock. The buttresses are big and fairly featureless with very few cracks, but there are some big crack lines on the upper buttresses that can be seen from the autoroute. Most of climbing is bouldering, with the problems marked with painted arrows. There are plenty of boulders on the open slopes that are mainly small to medium in size, on the higher slopes there are larger boulders. I have only explored the eastern end of the crag. The upper buttresses will have to wait until next year hopefully.
Very close to the Autoroute (A8) there is a carpark at the edge of a wood, behind this carpark in the wood there are many large boulders, this appears to be the most popular area, but the rock tends to be a bit green. It seems that the whole mountain is on private land but the local commune have negotiated some access footpaths and there are designated car parks.
Plenty of parking on verges and small car parks.