Mountain Biking (59)
An afternoon discovering a few singles above Bernin and St Ismier. I followed the route: Crolles -> Ch.
Pierre Champ Bertin
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.
Le No Name
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 + Pierre Champ Bertin
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.
Torrent de Corbonne
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.
Lunch ride in the heat
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.
Manival with the Croix de Trousset
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.
Tour of the Gorge de Manival
Climb the left bank of the Manival stream following a good jeep track to the to the Manival Forest Cabin (open, unguarded) at 870m. The track is very steep for 50 meters.
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