Lognan
Lognan - Argentiere
Take the Grands Mtets cable car in Argentiere to the mid station ( Lognan ). From Lognan the track is the home piste in winter. Exit the station and turn immediately left. It's very wide but extremely rough all the way to Argentiere. It drops 800m but feels like 8000m. Your bike may not survive the beating it will get.. 1hr descent from Lognan - only for the mad bikers with strong bikes.
Lognan - Le Lavancher
From Lognan take the first right 4x4 track which heads off towards Plan Joran. The 4x4 track eventually leads into a large bowl with views of Chamonix. It turns into a small walking track, then exits the plateau to start the descent into Le Lavancher. The track is technical with many zig-zags. 1hr from Lognan - a very tough and technical ride.
Flegere/Brevent
Planpraz - Chamonix
Take the telecabine from Chamonix to Planpraz ( 2000m ) The 4x4 track is located over a small rise behind the station. It descends rapidly to the left. The track is steep and very tough on body and bike. The trail becomes easier as it descends. Try it. The views are magnificent. 1hr decent from Planpraz - for advanced riders.
La Flegere - Les Praz
From Les Praz take the La Flegere cable car to the top. ( 1877m ). From here the views of the Mer de Glace and the Grande Jorasses are incredible. From the station take the 4x4 track on the immediate left outside the station. This is another steep track through the trees to the valley floor. 1hr descent from the station. - for advanced riders.