(1) From the car park, go down for about 50 meters on the road to Grenoble. The path starts on the left, follow Col des Ayes (red and white GR signs). (2) At the Col des Ayes, keep going on the right to Pas de l’Oeille. (3) At the junction 1,640 m, turn right towards Pas de l’Oeille (3). This part of the hike can be challenging. When you reached the Col, the top of the Dent de Crolles appears on your right. (4) From the top, go down in the small valley towards the North. At the junction 1,800 m, follow Col des Ayes par Trou du Glaz (5). This part of the hike can be challenging. The path passes in front of the Trou du Glaz, enjoy the coolness! The itinerary reaches the Ayes’ meadow, then the Col des Ayes and the car park. You can do this loop the other way around.

Admission fee : Free of charge.

Opening : From 01/05 to 30/11 daily. Subject to favorable weather.

Area : Grésivaudan