Start from Pierre Aigüe on the D926, just past Saint-Sorlin-d'Arves as you climb towards the Col de la Croix de Fer. A car park is located near a hotel and a pizzeria.
(S/E) Head south and follow the D926 downhill. Pass the Chemin des Cigales on the right and immediately take the next right.
(1) You’ll come out onto the Chemin des Prés Plans; follow it to the right. Go under the bridge carrying a ski run, then under a chairlift line. Then pass a ski lift line on your left. Go under another chairlift line and you’ll immediately reach a Fork in the road.
(2) Take the left-hand path (the right-hand one leads to a car park, which can serve as an alternative starting point). Pass under another chairlift line and continue south on a wide track until you reach a fork in the road: a small, shaded picnic area with two wooden tables.
(3) Keep left (south-southeast) and you will soon reach the Croix de la Troche: a sign indicating that you are entering an alpine pasture area.
(4) Continue south on the track, leaving the mountain bike trails and other paths to your right. After a slight bend to the right, cross the hamlet of La Mollardière and arrive at Les Prés Plans, where the Notre-Dame de la Paix Chapel stands.
(5) Continue along the wide track (south-south-west). Descend gently and, after a sharp left-hand bend, you will reach the site of Les Deux Ponts. Cross the first bridge.
(6) At the junction on the other side, turn left towards Lac de Laital and cross the second bridge. Ignore a path on the right and continue south along the track towards Col d’Ornon. Climb slightly through the woodland before reaching a large alpine meadow, with a fine view of the surrounding valleys.
(7) The return journey follows the same route in the opposite direction, back to the car park (S/E).