Park your vehicle in the car park located between the secondary school and the swimming pool, south of the town, near the roundabout between the D502a and the D518.
(S/E) Head south along the D518 road (towards Lieudieu/La Côte Saint André). Cross the roundabout and stay on the left-hand side of the road on the paved shoulder intended for pedestrians.
(1) When the pavement ends, at the edge of the small wood, take the small road on the left (towards the east) towards "Les 4 Sapins". On your left, you will see a hill, and on your right, the plain.
(2) Take the first tarmac road on the left. It's uphill (enjoy it, as it will be the only real hill on the walk...). At the top of the hill, turn right onto the path that follows the ridge of the hill (towards the east). Along this path towards the highest point, if the weather is clear, you will see the majestic Mont Blanc in front of you!
Take the first small tarmac road on the left (north). Pass three paths or roads and, when you reach a T-junction, turn right (north-east). Cross a small wood and you will come out onto the D502 departmental road.
(3) Turn left (north-west). Be careful! Traffic travels fast on the straight stretch. Stay on the left-hand side of the road, facing the cars, and if you have children with you, hold their hands.
Turn onto the first small road on the right (north) and then, further on, after a wide bend, turn right again (north-east). You will arrive at the Etang de Montjoux. Continue straight ahead, crossing the Gervonde stream, which you will find again further on in Saint-Jean-de-Bournay.
(4) To the north of the lake, there is an educational route (allow for an extra kilometre or so). It is not possible to walk around the lake. Cross the D522 (visibility is good) and take the small road opposite. When you reach a T-junction, turn left and continue straight ahead. The road becomes a small asphalt road and leads to Chemin de la Tuilière, which you take on the left. You are now in front of the Saint-Pierre Chapel.
(5) Turn into the lane opposite the Chapelle Saint-Pierre (Route de Bournay) and join the Route d'Artas, which you take on the left. When you reach the main street of Saint-Jean-de-Bournay, cross over and continue straight ahead on a small path along the Chanisson stream, which could do with some better maintenance.
(6) Cross Rue Bayard and continue straight ahead.
(7) When this stream joins the Gervonde, turn right and follow the latter, which you have already seen at the Etang de Montjoux.
You will come to a small lane (Chemin des Rameaux), which you take on the left. Continue left on Avenue de la Libération to reach the car park (S/E).