Drive your car right to the top of the Sainte-Foy-Tarentaise resort. Take the track leading towards Le Monal (it has a few water-crossing sections but is perfectly passable by car) and you’ll arrive at the Coleurs car park.
(S/E) From the car park, head towards Le Monal via the Via Alpina.
(1) Walk through the hamlet of L’Échaillon and reach Le Monal.
(2) At Le Monal – where there is a mountain hut if needed – walk through the hamlet then head uphill to your right. At the first Fork in the road, turn left towards Le Clou, where you’ll join a wide path.
(3) Follow it to the left and pass below the Clou Dam to reach the hamlet of Le Clou.
(4) At Le Clou, take the path on the left which climbs quite steeply towards Lac du Clou.
(5) At the lake, follow the path that continues to the left and climbs towards the Col de L’Aiguille (there are several, but the path is easy to find).
(6) At the pass, head down along the ski runs, heading towards the chairlifts on the left. Pass under the Aiguille chairlift twice and reach the hamlet of Arpettaz
(7) Continue along the track, then take the path that branches off to the left, passing under the Arpettaz chairlift, towards Le Monal (which will now be clearly signposted). The path continues through the woods.
(8) At the junction, a sign points you towards the return route to the Coleurs car park (S/E).