Park at the side of the D520B near the Pont de Saint-Bruno: 4 or 5 parking spaces upstream.
(S/E) Cross the bridge heading towards Saint-Laurent-du-Pont.
(1) Turn left. About 100m further on, head down to the left along the path to follow the course of the Guiers Mort upstream. Follow the course of the stream as it flows through a small gorge. Local markings featuring blue fish have been put in place; this makes it easier to navigate among the boulders and helps ensure you don’t get lost in sections that could become tricky.
As you make your way along the stream, cross it several times via footbridges installed by fishermen. Following the blue fish markings, head slightly uphill to the right towards a track.
(2) Take this track, turning left. Head down to the edge of the stream, then climb back up to reach the footbridge at the foot of the Pic de l’Oeillette. After the footbridge, join the road.
(3) Walk down for about 150m, then take a path on the left which leads back to the edge of the stream, where you can take a break if you wish. Depending on the flow of the stream and the water temperature, wade across to rejoin the outbound route on the opposite side. Continue to the right.
(2) Go straight on along the grassy, sometimes damp and unmarked path for about 800m until you reach a small cairn at the edge of the path.
(4) Turn right down the slope to descend to the stream via a winding path, rejoining the route that runs alongside the stream, then cross the bridge to reach the car park (S/E).
