Delicate passages : This walk is partially done on the edge of cliffs, stay on the marked paths.

Admission fee : Free access.

Opening : All year round.

Step by step description : When you get off bus 58 at the "Col de Comboire" stop, you'll see a yellow sign indicating the direction to Les Cimentiers, which you'll follow. A hundred metres after leaving the road, turn right, heading south, to join the path leading up to "Les Cimentiers", towards the Belvédère de Comboire. You'll need to climb a hundred metres or so on a fairly steep path to reach the top of the rock. Depending on the season, you'll be able to observe the Mediterranean vegetation, such as the Montpellier maples with their characteristic three-lobed leaves. At the top, an exceptional panorama of the Grenoble basin and surrounding mountains awaits you. From here, the long rocky ridge of Comboire offers a relaxing stroll of almost 2 km, with the conurbation to the east and the limestone cliffs of the Vercors to the west as a backdrop. At the northern end of the loop, near Les Nalettes in Seyssins, the trail begins a steep descent, before gradually turning south along a wide, shady track. Follow the signs for Les Cimentiers to rejoin the path back to the start, then the road, where a bus will take you away from this area, so rural yet so close to the city, with no doubt a few regrets.loop via the summit of the Comboire rock. FORT DE COMBOIRE Built at the end of the 19th century, this is the latest in a series of 6 forts to defend the ancient capital of Dauphiné (the others are Saint Eynard, Murier, Bourcet, montagne de 4 seigneurs and Montavie). CEMENT STONE QUARRIES The rock of Comboire conceals a veritable network of underground galleries, dating back to the quarrying of cement stone by the Vicat company, founded by the inventor (Louis Vicat) of cement in 1827.

Area : Grenoble-Alpes Métropole