Park at Coll del Pam, where you’ll find ample parking.
(S/E) Leave the car park and take the well-marked track to the left, which offers panoramic views from the very start. You’ll reach the junction with a ski run just before the Avellans chairlift.
(1) Head down this track, turning off to the right. Pass under two chairlifts and reach a three-way junction.
(2) Turn left and begin a gradual, more winding ascent. You’ll reach the junction with the path coming from the Pla des Avellans car park.
(3) Carry on to the left to reach Estany de la Pradella. This is a good spot for a quick break and to enjoy the scenery.
(4) Carry on straight ahead along the signposted path, pass the Cabane de l’Estany de la Pradella and reach a triangular junction of tracks.
(5) Head straight on and, after a climb with no shade, you’ll finally reach Lac des Bouillouses. Keep the dam on your right and continue along the lake’s shores.
(6) Follow the ascent route in the opposite direction to return to the Coll del Pam car park (S/E).