Park on Avenue de la République in Échirolles, at the Frange Verte park (Echirolles-Village).
As the park is popular, numerous parking spaces have been provided. Alternatively, take the tram.
(S/E) Walk along the short right-hand side of the park heading south towards the woods to reach the wide, sheltered footpath running from west to east. Turn left towards the east. The route to follow is marked with a yellow line on the trees and signs. After a few hundred metres, you will come to a fork with a sign.
(1) Turn right onto the only wide forest path going uphill. The sign says: Combe de la Gouderie: altitude 240, Étang de Haute Jarrie: 2.62 km. Follow the yellow markings on the trees. Climb this forest path, which will soon turn south and gradually level out. On this climb, pass the hamlets of Pend Loup and La Savoyarde to reach La Gouderie, a crossroads of five different trails.
(2) Head towards the entrance to the meadow opposite without entering it. Take the forest path on the left, towards Étang de Haute Jarrie or Le Rucher. The path heads south and runs along the meadow on the right. After the farm on the left, take a tarmac road which soon turns south-east.
You will arrive at the junction of two tarmac roads.
(3) Enter the Haute Jarrie Pond nature reserve here, located mainly on the left side of the road between the barriers. Follow the path along the reserve. Informative signs about the wildlife hide a path on the left leading to a pontoon with a view of the pond (the attached route includes this passage to the pontoon). Leave the nature reserve to the south and follow the tarmac road for a few hundred metres to reach a roundabout called Le Plâtre.
(4) Turn left north towards Échirolles Village. Go up the tarmac road and follow the signs for Échirolles Village. The vertical markings to follow are white and red. You will reach a Y-shaped crossroads.
(5) Leave the tarmac road that branches off to the left and take the forest path downhill opposite. Enter the woods and follow the signs for Voie Romaine. At the bottom of the hill, you will come to a chapel.
(6) Continue to the right, finish the descent and you will find a new crossroads of paths at the industrial estate.
(7) Turn left, walk along a canal and then continue along the wide footpath under the trees to reach the original crossroads.
(1) Follow the same route as on the way out to return to the Frange Verte car park (S/E).