Start: The start for the hike is the arrival station for the first section of the Planpraz cable car. There are a number of paying car parks in the vicinity of the departure station, located at Le Mollard.
(S/E) Leave gently on the wide path leading to the arrivals of the 2 lifts (north-east, Stade lift). Continue North for 200m, then take the left-hand path towards Col du Lac Cornu. Reach the crossroads of the lake path and the GRP®.
(1) Leave the GRP® Tour du Pays du Mont Blanc on your right. Continue to climb North then North-East. The slope steepens below the pass for the last 150 m. Reach the Col du Lac Cornu.
(2) Descend towards the lake, which can be seen below to the North-West.
(3) Follow the same path back up to the pass.
(2) A hundred or so metres before the pass, turn North-East towards the Aiguille Pourrie. Pass under the summit and descend to the Col de la Glière.
(4) A hundred metres further on, take the right-hand path down through the Combe de la Glière. The start is a little tricky for about 20 metres, but cables are in place to help. The path descends fairly quickly at first, up to elevation 2000, then turns into a balcony. It ends with a short climb to the bottom of the Index chairlift. Reach the chairlift station (S/E).
Take the chairlift for the descent (panoramic view of Mont Blanc). Continue to the Flégère cabin. Once in Chamonix, it's about 2.5 km to your departure point at Planpraz. The Flégère-Les Houches bus line can be used, getting off at Chamonix center.