(S) From the Refuge de Nice, head east and rejoin theGR®52(red and white markings) towards the Refuge des Merveilles. Climb up and then descend into a small valley. Cross a stream via a footbridge and climb back up.
(1) Cross a ford. The slope steepens again towards the Baisse du Basto. A difficult climb, where the slope rises rapidly with a steep gradient. Before reaching the Baisse, you’ll pass numerous lakes, some of which are dry.
(2) Pass the Baisse du Basto and descend towards Lac du Basto (south-east). Walk past the lake (snowfields possible).
(3) At the bottom, at a junction (Lac du Basto on the left), take theGR® which climbs steeply to the right (south) towards the Baisse de Valmasque.
(4) At the Baisse de Valmasque, head down towards the Vallée des Merveilles. Difficult descent. Please note that crossing this valley is strictly regulated. In particular, if you are using walking poles, rubber tips are compulsory. Pass by several lakes, including Lac des Merveilles.
(5) Here are the instructions from the crossing point.
(6) As you leave the valley, turn left (east) and head for the southern shore of Lac Long Supérieur, where the Refuge des Merveilles is located (E).