Start on the D535 between the motorway slip road and the INRA roundabout (car park).
(S/E) Go through the barrier and down the track to the Valmasque, which you must cross (or follow its course in the bed on the right). Follow the path on the right bank for a few dozen metres and go back down into the stream.
(1) Go through the tunnel. At the exit, either take the path on the right going uphill, then left (option shown on the route map for this hike), or follow the stream upstream(muddy at the moment), then cross and take the path going uphill on the right bank.
(2) At the flat section, turn right and follow the river on the right bank through the undergrowth, staying on the well-marked yellow trail. After a short climb (switchbacks), you will soon reach a wide track (signpost).
(3) Take the path opposite, arrive at Le Fugueiret (footbridge torn down), and climb up the right bank. Pass under the power line and arrive at a beautiful track (sign).
(4) Leave the marked trail and climb up the path on the left (not shown on the IGN map) to reach a plateau (power line).
Head straight ahead and slightly to the right onto the track marked D35 (you will find the yellow markings again) and follow it. Go through the barrier and, after a few minutes, you will find the start of a beautiful track that descends to the left.
(5) Follow it and, after three hairpin bends, cross the Valmasque and arrive at the Serpent track (signpost). Turn right and go up the track along the right bank of the river to reach the ruins of the Roman aqueduct (completed in the 1st century BC).
(6) Go past the structure and immediately climb up to the left to walk along the waterway. At the top, take the path that descends to the left and join a track, which you take to the right at the same level, leaving it to climb to the right after a few minutes.
Continue straight ahead along the well-marked path, which descends slightly and soon reaches a track. Take this track downhill for a few metres to the left to reach a wide track (please note: tram works in 2015).
(7) Take the wide track on the right that climbs uphill, cross a bridge to reach the signpost from the outward journey.
(3) Retrace your steps in the opposite direction.
(2) Leave it for a well-marked path on the left that joins the road via a short climb over rocks (no danger).
Be careful when exiting onto the busy road.
Turn right, cross at the pedestrian crossing and then descend to the right to the car park (S/E).
), you can just do the part