Quick tour behind the house of the Côte Borne and the Champ Bertin. Surprisingly dry in the woods and quite warm given it is boxing day.

From the hamlet of le Civet climb the route de Bois to les Massons then the reservoirs of St Ismier. From the reservoirs take the right fork towards the Col de Faita.

An afternoon discovering a few singles above Bernin and St Ismier. I followed the route: Crolles -> Ch.

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.

From the reservoirs follow the broken tarmac road towards the Tour d'Arces. The track is very steep, around 15%. Continue past the tower and continue to the Pierre Grosse.

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.

Follow the Pierre Grosse trail. At the end of the 33 hairpins take the right fork rather than crossing the torrent on the left. After about 20 meters of descent cross the Corbonne stream.

Afternoon ride from home to tackled the famous Pierre Grosse singletrack. It consists of 33 very quick and short switchbacks but relatively easy. See map for other trails used.

From the Massons car-park follow the signs to the "La tour d'Arces" then "Pierre Grosse"; carry on past the Pierre Grosse on the left to the end of the trail.

Climb via the road, 55 minutes on an MTB, descent via the trails from the Col du Lauteret, rode through village via Mt Fallet track then back to la Roare.