Fantastic view of the city of Grenoble. Well worth the trip. Because the incline is so steep, we recommend taking the ski lift, which is reasonably priced. Unless you are in really good physical shape! There is a lot in repair. Going through dark tunnels, take care not to trip on upturned pavement pieces or slip if it's been raining. There are some slippery rocks. Walking down, there are several forks in the road to explore.