Hasn't voted | Trail Head: from the Village of Arrens-Marsous, follow the road leading to " Plan d'Aste - Parc National des Pyrenees "( avoid the road leading to " Lac d'Estaing " ).
Park beside the small house " Maison du Parc National " - 1470m -
Route: Cross the Gave d'Arrens on a footbridge, and head south on a good trail. After the Lac de Suyen, head to the right ( South/South-East ), crossing the stream and hiking up towards the " Refuge de Larribet / Larribet Hut ". The path is well-marked with yellow post signs and cairns.
Refuge de Larribet: - 2060m -, 2 hours from the trailhead. Hike up to the Breche de Garenere / Garener Breach, to the SouthWest. From the Breach, go down to get above the Lacs de Batcrabere / Batcraber Lakes. Follow the path to the SouthWest, than to the South, from the last Lake ( Lac Inferieur du Micoulaou ). No path anymore, only cairns.
Reaching the foot of the Col Noir ( Black Pass ), you have to choose: either get crampoons and climb in snow and ice, either climb the screes and rocks on the right ( a bit tricky, not for beginners ). Once at the top of the Col, climb down 50m to get the path coming from the Lacs d'Arriel and leading to the Grande Diagonale.
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