(S) From the Refuge des Mottets, head straight ahead along a series of hairpin bends to climb a spur, passing close to a ruin, then leave the path leading to the Chalet de la Seigne on your right. The slope becomes less steep, and after a long, straight climb, you’ll reach the Col de la Seigne (2,516 m).
(1) Descend through the wide Lée Blanche valley. Cross a few gullies and then a large torrent at the foot of a rock face (snowfields). Take the track that passes close to a renovated former military building known as the Casermetta du Col de la Seigne (2,365 m). You will reach the Alpe supérieure de la Lée Blanche (2,285 m).
(2) Follow a path that initially descends and then levels out, finally reaching the Alpe inférieure de la Lée Blanche (2,035 m).
(3) Take the stony track which descends in a few hairpin bends and then runs alongside the vast marsh with its varied alpine flora, known as Lac de Combal.
(4) The valley narrows; it is closed off downstream by the colossal moraine formed by the Miage Glacier. Reach the Lac de Combal reservoir (1,975 m). Leave the road and take the path which climbs steeply to reach the sheepfolds of the Arp Vieille Inférieure.
Follow the line of greatest slope and climb across the pasture, parallel to a stream, to the Chalet de l’Arp Supérieur (2,303 m).
(5) Go round the chalet and continue the ascent to the left. At around 2,430 m, you’ll reach the north ridge of Mont Favre (a sheer cliff) and descend into a wide basin fed by a torrent coming from the Col du Youla. Continue north-east. After the small Lac des Vesses, the balcony-like path begins a long descent.
Pass beneath the cables of a ski lift and reach Lac du Chécrouit (2,165 m).
(6) The path, still running along a ledge, loses altitude, passes beneath the chairlift line and reaches the Col du Chécrouit (1,956 m), where the Maison Vieille mountain hut (E) is located.