N.B. See the practical information on how to get to the start of the hike ?️ and also to understand the directions ? and the terminology used for peaks and waypoints.
(S/E) From the pass, take the clearly visible north-easterly path heading towards a signpost indicating the Col Perdu. Follow the path, which reaches the Col Perdu in less than 800 m.
(1) At the pass, do not take the path heading south-east! Instead, head back down the other side towards the north for less than 100 m and take the first path that descends to the right towards the east, along the slope below the Pic Ouest de Côte Belle. Then follow this very good path along the slope to go round a rocky shoulder and then climb up the Casse des Oules. Just before the Col des Portes, cairns mark a shelter in the rock which can be used in the event of a storm.
(2) From the Col des Portes, head due east up the ridge, following the sometimes contradictory cairns to take the easiest route and aim for the clearly visible gap between the South Tower and the South Summit. The couloir descending from this gap features a rocky spur in the middle. First, head for the left-hand side (right-hand branch) of the couloir to reach the base of this spur, then traverse to the right-hand side beneath this base and complete the ascent on that side. A snowfield covers the gap all year round.
(3) At the gap, look out for the fixed rope on the left on the north face. This rope is not essential but it indicates where to climb on the rock, which has good holds. At the top of the fixed rope, take the ledge running off to the right towards the north-east. Follow this ledge (see orientation photo), which quickly becomes almost horizontal and descends slightly before leading to a small dihedral, allowing you to gain a foothold in the small, gullied cirque beneath the summits, whose ‘antennas’ you will soon be able to see.
Climb up the easy gully in this hollow to reach the central summit.
(4) From the central summit, follow the ridge on the eastern flank to reach the southern summit and admire the South Tower.
(5) Return to the saddle (3) via the ascent route. A rope may provide reassurance for those who are not comfortable with downclimbing. From the saddle, descend to the Col des Portes.
(2). At the pass, descend by sight down the scree slope to the south-west. There are no cairns, but simply head for the grassy ledges below, keeping a south-easterly bearing (right bank of the Casse des Clausins). Reach an almost horizontal path skirting the foot of a shoulder descending from the Crête des Oules and continue along this path towards Lac de Souliers, which is clearly visible.
(6) From the lake, take the excellent path descending south then south-west. It skirts the ridge extending from the Crête de Coste Belle before heading slightly downwards north-west towards the Col de l’Izoard road.
(7) Once you reach the road and the car park, look to the left (at the southern end of the car park) for the start of the path leading down to Brunissard (signposted). Follow this path down to the pebbly bed of the Izoard torrent.
(8) Cross the tributary of the Izoard flowing down from the Casse Déserte, then follow the Izoard torrent northwards, first on the left bank and then on the right bank. After a few hairpin bends, the path crosses the tarmac road four times before reaching the Col de l’Izoard (S/E).