The start is about 1.5 km after the summit of the Col de la Lombarde, on the Italian side. A trail starts on the right side of the road. You have to look carefully to see it from the car, but there is a sign attached to a rock. You can park two or three cars about ten metres below the trailhead, on the right side of the road.
(S/E) Follow the trail uphill towards Colle Orgials and Colle dei Morti as indicated by the signpost. You will soon reach a signpost (numbered 352) located at the intersection of two trails.
(1) Continue towards Colle Orgials, leaving the trail to Colle dei Morti on your left (return trail). You will then begin a climb through a very rocky landscape. The trail is clear and marked in red and white. Reach Colle Orgials.
(2) You can make an optional round trip to the peak of the same name (interesting viewpoint).
(3) Descend to the previous junction.
(2) Continue right on the path that winds down towards the Orgials lakes (or Valletta), the first of which can be seen from the pass.
(4) Pass the Orgials Lakes (the trail overlooks them, but a path allows you to reach the shores if you wish) and reach a marker located at the intersection of two trails. Follow the direction of Rifugio Malinvern. The trail now passes through a much greener landscape and is very pleasant.
(5) You will reach a third small lake, located on a flat area, which you will leave on your right as you continue eastwards. After this plateau, the slope descends steeply to the Malinvern Refuge.
(6) Reach the Malinvern Refuge and continue on the track on the right that descends along the Rio Freddo valley, heading north. Reach a marker (numbered 349).
(7) Continue along the track towards Vinadio.
Note: if you want to make a shorter loop, you can follow the signpost for Lago Sottano d'Aver and then rejoin the route at Lac Inferiore. Reach another signpost (unnumbered).
(8) Follow the signs for Lago Martel, taking a path that climbs up into the forest on the left (west). Here begins a long and challenging climb up a very steep path. The first half of the climb is very shady and there is a stream halfway up where you can cool off. Reach Lake Martel.
(9) Turn left to make a round trip to the south (about 10 minutes) to admire Lake Nero.
(10) Retrace your steps.
(9) Continue towards Lago Soprano d'Aver. From here, there is no real path, so follow the numerous red and yellow markings and cairns. The climb is particularly steep, mostly over scree, where you may need to use your hands.
(11) Reach a small plateau and continue to follow the cairns westwards. There are regular cairns and red and yellow markings, which you should follow to the lake.
(12) At the upper Lac d'Aver, follow the signpost for Lago Sottano d'Aver. Begin a relatively steep but fairly short descent. You will soon see the lake. Reach the signpost for Lac d'Aver Inférieur.
(13) Keep to the right towards Colle dei Morti. This is the start of a final climb, which is quite challenging due to the distance already covered and the elevation gain. The slope is relatively steep (about 400m of elevation gain from the lake to the pass).
If you reach this lake directly from marker 349, don't hesitate to make the round trip to Lac d'Aver Supérieur.
(14) At Colle dei Morti, you will see the top of the Isola 2000 ski slopes again. Follow the path downhill towards the south-west. It is impossible to lose the trail, as it is marked by two rows of stones. You will come back to marker 352, which you passed at the start.
(1) Turn right to rejoin the section of path taken on the way up until you reach the road and the starting point (S/E).
