The hike starts at the car park just after the Vens waterfall, shortly before arriving at Pra. There are several parking spaces available on the left side of the road opposite marker 20.
(S/E) At the marker, take the path that descends towards the waterfall for a few hundred metres. You will pass another small car park and then cross the stream via a bridge to the next marker.
(1) At marker 21, climb towards the Lacs de Vens. The ascent is very gradual and pleasant, with plenty of shade if you set off early enough. The path winds gently, crossing the Vens stream several times.
(2) At marker 22, continue south-east towards Pas des Pêcheurs. The gradient increases slightly for a few metres, then you will finally see the fourth lake below.
(3) When you reach marker 27, head down south-west, going around the lake to visit the three smaller lakes, which are well worth the detour. Pass marker 26 to see thefirst lake (the smallest).
(4) Here, you can continue towards Lac de Rabuons via the energy trail and take a look at Lac des Babarottes. Otherwise, turn back to return to thefourth lake you reached when you arrived.
(3) Pass marker 27 again to go around the lake to the north towards the Refuge de Vens.
(5) After following the northern shore ofthe fifth and final lake, follow the path along the electric fence to reach the refuge.
(6) Take the opportunity here to refill your water bottles before beginning your ascent to the Col de Fer.
(7) At marker 25, head towards the Col de Fer.
(8) At marker 24, continue in the same direction. The climb to the pass is gradual and pleasant, with no technical difficulties. You will arrive at the small pass of Tortisse at marker 35a.
(9) Continue north towards Col de Fer. The summit of Fer is accessible via the path on the right.
(10) Marker 35 marks the Col du Fer and the Italian border. Descend north-west towards the Tortisse huts.
(11) You will arrive at marker 34 at the Tortisse huts. Continue west towards Le Pra. You will arrive at marker 33, continue towards Le Pra, which you will soon see below.
(12) You will rejoin the road at marker 32. From there, simply descend towards the car park where you started (S/E).