Country:
District:
Parking in Perquelin, a few kilometres from Saint-Pierre-de-Chartreuse. At the end of the tarmac road, continue for a few dozen metres to reach the car park.
(S/E) Take the forest road (east) to a fork. Turn right and immediately take the small path on the right: there is a signpost and a red dot marker.
(1) From this point, follow the yellow markings to the right. The fairly steep path leads to a forest track.
(2). Turn right off the forest track.
(3) A little further on, take the path that branches off to the left (directional sign).
(4) At the next fork, take either the right or left path. Both paths lead to the source of the Guiers.
The path on the left, which is not shown on the map, leads to the foot of the source , but access to the cave entrance requires a guide.
The path on the right , which is marked on the map, provides access to the banks of the Guiers just below the source. It also provides access to the cave just after crossing the Guiers. This route is less dangerous than the other path, although the final climb is tricky.
(5) From the source of the Gueirs, you can return via the same route you took on the way there.
(2) However, once you reach the main path, you can continue along this forest track by turning right (as shown on the map) instead of taking the uphill path. The path takes you gently back to the starting point (S/E).
For those who want to continue through the gorges, here is the link on Visorando:
Around the Guiers Mort (2): the gorges
a pleasant walk with magnificent scenery. Living nearby, this is a walk to be repeated with family and friends
Visorando member
Difficult 
Very difficult 
Association / Club / Walk leader
Tourism professional
