To get to the start of the hike: from Molines-en-Queyras, take the Col Agnel road towards Italy. After passing Fontgillarde, park at the Pont de Lariane car park.
(S/E) Cross the bridge and turn left (south-east) onto the track that climbs towards the pass.
(1) Just after the forest and after crossing the small stream (Rif de la Souchière), leave the track and take the path on the right which climbs more steeply. A few metres higher up, look for a large tree commemorating the Roux family with a bench. Continue in this direction until you reach the pass.
(2) Opposite Cousta Embrencha, the path splits in two, but the two branches rejoin a little further up. The left-hand branch (going uphill) is more even and is sometimes used by mountain bikes. It is best to take this path on the way down.
(3) Arrival at Col de Longet.
The return journey will be via the same route as the ascent to reach the Pont de Lariane car park (S/E).