Arête des Géodésiens
From the Arrémoulit hut, head east towards the Col du Palas. At Palas lake (2359 m), head due north to skirt around the Palas. Progress is by sight through sometimes unstable scree, threading as best you can between the rocky steps, then gradually trending east towards the Notch of the Geodesists (cairns).
Follow the ridge to the south, avoid a substantial rock outcrop by going west (cairns and traces) and return to the ridge beyond. The final section is easy (occasional grade II moves on large blocks) but airy and somewhat intimidating for beginners.
First ascent (during the first ascent of Palas): 1825 - Geodetic officers Paul-Michel Hossard and Pierre Peytier with guides and porters.
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Classic ascent to Larribet refuge then Lac de Batcrabère and Lac de Micoulaou and follow a well-marked trail leading to the Port du Lavedan. Around 2400 m leave the path and take the broad scree slope to Col de Barane 2643 m, then bear left east to reach the summit 2703 m. Descend to the col then…
Details →From the Arrémoulit refuge, follow the trail to the Col du Palas. Before tackling the final ascent, bear left to reach directly via a large grassy step and scree the notch at the foot of the Piton.
Details →- From the Arrémoulit refuge (2303 m), gain the Col du Palas (2517 m), follow the old white-red-white markings to go around Piton Von Martin by the south and gain Port du Lavedan (2615 m).
Details →From the Arrémoulit refuge (2305 m), gain the Col du Palas (2517 m) following the old white-red-white markings. Go around Piton Von Martin on the south side. From the col, traverse toward Port du Lavedan, following the markings and ledges. You then cross a ridge line that blocks the view of the…
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Source: camptocamp.org · text under CC BY-SA 4.0
