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.

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.

Tour behind the houses. First of all climbed to the Rock of Champ Bertin - a huge stone in the fields behind Bernin. You can boulder and climb on this rock which is about 20 meters high.

A short tour to test out my spiked winter mountain bike tires. After the source du Sanglier the snow was too deep to cycle.

Missed the turn to the top of the ski lifts at the col de Marcieu. Instead took an interesting looking trail that climbed steeply but had a good surface.

Initially I set out for the whole tour but it started raining - thunder in November.

This route is in the Chartreuse Regional Park behind the small town of Crolles about 20km north of Grenoble. It forms a dumbell.

A gentle ride through the valley with a return along the foothills, autumn is here and they say snow in the mountains tomorrow.

A short circuit to explore some of the tracks between Crolles and la Terrasse but generally staying in the valley.