A must-see natural site at the foot of the Hauts de Chartreuse nature reserve, the circus offers a walk between forest and torrent to discover its 4 waterfalls, and access to the resurgence cave of the Guiers Vif spring.
A nice collection of waterfalls along a distance of 800 m. The paths are easy accessible and many wooden bridges. There is also an ancient ruin on the way which …
Magnificent viewpoint, both at the top and at the bottom. Some technical sections favor hiking rather than trail running. You'll find ibexes (and their babies), chamois, and marmots at the …