Les Grands Montets (1235-3300m) in Argentiere is another great area for mountain biking. An excellent route is from the top of the Lognan cable car down to the village of Lavancher.
This trail is most suited for intermediate to advanced riders and gives panoramic views across the valley. Just exit right from the cable car and follow the 4x4 track past Plan Joran Restaurant which eventually turns into a small walking track. This is a technical descent with many tight switchbacks and criss-crosses, again watch out for hikers.
Another option at Grands Montets is to turn immediately left out of the Lognan cable car and head back down to the gondola car park. This is the wide intermediate graded 'home run' piste during the winter yet in the summer the terrain changes completely becoming extremely rough and rocky - a real bone shaker! Although it's wide, it’s certainly a challenging route that has a 700-800m vertical drop so it is really best completed by expert downhill riders with full suspension bikes.
For an alternative entry to the ‘home run’ head up the slight gradient towards the Logon refuge (perhaps stopping in for some food if the climb has tired you out) then heading back down on a very technical and rocky track to join the piste about half way down.