Access: From Lanslebourg-Mont-Cenis, head towards the Col du Mont Cenis. Shortly afterwards, take the small road on the right which leads to the Col du Petit Mont Cenis 6 km further on. Park at the end of the road after the Coulours farm.
(S/E) Follow the track heading south-east. After two hairpin bends, it joins the path leading back to the Lacs Perrins.
(1) Continue along the track to the end, which runs along the side of the Vallon D'Ambin, then joins the Savine stream at the EDF water intake.
(2) Go back up the path on the right bank of the stream. Reach the ruins on your left and wade across the small stream on your right to reach the next crossroads.
(3) Continue straight ahead to climb up the long Vallon de Savine along the path, always on the right bank of the torrent. The lake is behind the peak of the cliff that can be seen at the bottom of the valley.
(4) At Lac de Savine, follow the right bank and head to the bottom of the valley. A slight climb takes you to the Col du Clapier.
(5) From the pass, head back in the opposite direction and return to the crossroads just before the ruins.
(3) Continue to the right, the path joins the bottom of the mountain in the curve it makes, then climbs through the rocks. Almost at the top, a handrail helps you through a tricky passage, but it is not too difficult. Continue almost horizontally and join the upper and lower Lacs Perrin lakes.
(6) Below the lake, ignore the trail on the right that leads to the Refuge du Petit Mont Cenis and cross the stream flowing from the lake's spillway. Continue along the trail, which quickly becomes a small path. This passes under a power line and rejoins the track taken almost at the start.
(1) Turn right and return to the car park below (S/E).
. The crossing of the valley is superb but a little long.