Park in the car park to the north-west of Arinsal. The first part of the route follows theGR®11.
(S/E) From the Arinsal car park, go through the tunnel then take the road on the right. Continue along the path.
(1) At the junction with the return path, continue left onto the marked path. This is a fairly wide forest track. Further on, after crossing to the right bank of the Riu de Coma, the track narrows into a path and the gradient becomes steeper.
(2) A flat section allows you to catch your breath before tackling a steep climb that leads to a small pass.
(3) The Coma Pedrosa refuge is further up, via a path on your left. Allow about fifteen minutes if you wish to go there. Otherwise, continue straight on into the Coma Pedrosa valley.
At the bottom of the valley, the path turns north and climbs up grassy slopes to a first lake before reaching Estany Negra. The area around the lakes is much rockier and there are a few scree slopes to cross.
(4) Continue along the valley floor, leaving the path that climbs to the summit of Coma Pedrosa on your right.
The path is not very well marked before reaching the Portella de Baiau. Head towards the pass by sight. There are no difficulties in this area.
(5) From Portella de Baiau, take the path that descends towards Estany de Baiau. You are now in Spain. Be careful: the path is steep and the ground is covered in gravel. The gravel is loose enough that the descent is ultimately manageable without too much difficulty. Nevertheless, it is daunting for those with a fear of heights. Arrive at Estany de Baiau.
(6) Leave theGR®11and head up the small valley on your right. There used to be a path here, but it has now disappeared. Climb up to the left of the stream, across the grassy slopes. The right-hand side of the stream consists of scree. Look for old markings a little further up which lead to the pass.
(7) At the Collada dels Estanys Forcats, rejoin a path that descends down the gravel and scree slopes. You are back in Andorra. A late snowfield may be present at the pass: if so, go round it on the right. Follow the path down towards the Estanys Forcats.
(8) At the largest of the Forcats lakes, the path leaves the scree zone and begins the descent down grassy slopes towards the Pla de l'Estany refuge.
(9) Continue along the path, which then joins a track. Pass close to some chalets.
(10) Continue along the path which descends, initially gently through the forest, then drops sharply to join theGR®11.
(1) Follow the road back to the car park (S/E).

ica d'Estats.