At Les Thuiles, take the small tarmac road towards Les Prats. Pass through Les Prats and continue along the main track to its end. Please note: 6 km of track. Small car park at the end of the track, before Les Hières.
(S/E) Follow the signposted path towards Lac de l’Aupillon.
(1) At La Jaumasse, take the signposted path on the left towards La Pisse and Lac de l’Aupillon.
Pass La Pisse, cross the Rioclar ravine and climb the winding path below Les Aiguilles. At La Bonne Fontaine, turn right and follow the upper Rioclar valley. Join the other ascent route coming from the right and reach the lower Lac de l’Aupillon.
(2) Go round the lake on the left and, at its western end, look for the path – which is more or less clearly marked at the start and more or less signposted – that climbs northwards towards l’Aupillon. You’ll reach a fork marked by a cairn.
(3) Leave the path on your right that descends eastwards – you’ll take this on the way back – and head decisively left. Follow the path as it climbs through scree. At around 2870 m, join the summit ridge and follow it to the summit of the Aupillon. Caution: the final section of the ascent is exposed and requires sure-footedness. You will need to use your hands on the rocks.
(4) Retrace your steps. At around 2,870 m, take care to leave the main ridge to the left, as it descends towards the Col de l’Eissalete.
(3) At the fork marked by a cairn, take the left-hand path this time, where you will find a few markers.
(5) Pass by the upper Aupillon lake and continue straight ahead along the path to reach the Col de l’Aupillon.
(6) Turn right and follow the ridge. Pass the Tête de Cougourde and climb the ridge to the summit of the Rocher des Cailles.
(7) Descend along the opposite ridge. Pass close to the Brec de l’Aupénas, then veer right before the pass at 2,615 m to pass by the small Lama Rasinière lake, which is often dry.
Continue the descent off-trail through the grassy valley heading north-west, more or less following the valley floor.
(8) At around 2520 m, look out for the cairns marking the path from Lac de l’Aupillon and take this path to the left. Follow this path down the long, steep and slippery slope into the Jaumasse until you rejoin the ascent route.
(1) Follow it to the left until you reach the car park (S/E).