I've filed this under mountain biking but I was on a road bike with 28mm tires. A bit of gravel in the valley then a longish climb on gravel. This was more or less ok.

A return to the Marie. I managed to screw up the entrance and do a loop and land on my head which left me a bit dazed for a minute or two.

From St Ismier, climbed to the Tour d'Arces than past the Pierre Grosse (large rock), continue 500 meters.

We'd not been through the rock garden on the single du Champ Bertin since it rained a couple of weeks back (too greasy) but today the approaches were dry which was a good sign.

We decided to cycle to the Climbing Rock to take the technical descent down. It is still pretty tricky for us but getting a bit better on the easier top section.

From the Reservoirs of the Fontaine Bonnet on the St Nazaire -> St Hilaire road follow the Chemin de la Communeaux unsurfaced road downhill for a couple of hundred meters.

No Name: From St Ismier climb to the Tour d'Arces (medieval watch tower) then take the Pierre Grosse trail. After the Pierre Grosse the "No Name" is on the left.