Park in the car park at the swimming pool in Loire-sur-Rhône.
Three municipal trails are signposted. The hike follows trail no. 2.
(S/E) Take the Montée des Pérouzes and head towards the Savot neighbourhood.
(1) Take the road on the right, which is Rue du Savot.
At the end of the small paved street, a dirt track descends into the valley to reach the Morin stream.
(2) Cross it via the small bridge and follow it, first on the left bank, then crossing several fords for about 2 km. Leave the first unmarked path that climbs up to the left
(3) Turn left. After fording the stream from the left bank to the right bank, the marked trail leaves the stream and climbs steeply into the woods. On a flat section, at a stone hut, leave the path that goes straight ahead and turn right. When you come out of the woods, the path widens and becomes straight. You will reach the road called Le Polaine, which is also the name of the hamlet.
(4) Turn right onto the small paved road. At the end of the hamlet, it becomes a stony path.
(5) At the first fork, where there are no signposts, take the grassy path on the right. Further on, descend to the left. You will arrive in the undergrowth. Leave the path that climbs to the left and follow a steep descent along a rutted track.
(6) Just before reaching the Morin stream, climb up to the left. On the climb, ignore the paths leading off to the left. The path is then widened by forestry machinery and leads to a farm track, which you take to the left.
This is a high, open point on the circuit. There is a vast panorama of the Monts d'Or, the Monts du Lyonnais, Lyon and, with a bit of luck, the Alps.
(7) Continue along the path on the left at the edge of the woods to reach the paved communal road of Les Pérouzes.
(8) Follow it to the left. Do not take the first marked path on the left, stay on the road, then turn sharp right at the altitude of 407, a dead-end road, towards Chainfray. In the bend, turn onto the path on the left. It descends to the east of a small pond. Ignore the path on the left that leads there and continue straight ahead. The descent becomes steeper and ends at the Rolland stream.
(9) Ford the stream and take the path on the left that follows the right bank of the stream.
Cross further on, after a short, slightly steep climb, to the other side. Return to the right bank a little further on. This double crossing avoids the obstacles of fallen trees on the path.
Stay on the right bank, on the beautiful path through the woods overlooking the stream, marked with red dots and a few yellow lines.
These markings lead you to cross again further down. The path moves away from the stream, climbing up the left bank.
At the next intersection, continue climbing until you reach the hamlet of "Le Fatigue".
(10) Just before the hamlet, turn sharply right. The path becomes narrow and tends to be overgrown with brambles, but this section is not too long. The path then becomes steep as it descends to the Rolland stream.
(11) After crossing the stream, turn left and follow it downstream.
After a final ford, the path climbs and widens.
Cross the road and take the path that passes under a small bridge at the hamlet of Le Moriat.
(12) At the road, descend to the left, then, before an old farmhouse with multiple roofs, turn right and rejoin the road in a bend. Take it to the left downhill. Reach Loire-sur-Rhône at Savot.
(1) Return to the start of the route and follow it back to the car park (S/E).

More like 13 km.