Grotte du Guiers Mort
|Northing: 45.32611°||Easting: 5.85757°||Altitude: 1,332 m|
How to find it
The cave is approached from Perquelin. Cars can be parked a hundred metres beyond the tarmac. From there the cave is sign-posted. It takes about 45 minutes. The path crossing the stepping stones below the cave leads up under the western cliffs to Trou du Glaz after a further hour.
Grotte du Guiers Mort is the resurgence and lowest entrance for the Réseau de la Dent de Crolles. It allows access to both the fossil system and the active system, and is the egress for the equipped through-trips from P40, Gouffre Thérèse, Gouffre Pulpite, and Trou du Glaz. It is also the starting point for a couple of round trips equipped with pull-through chains, pitch-head traverse lines, fixed ropes, and waymarkings, which have been well described in route guides produced by Spéléo Secours Isère, the local rescue organisation. These are:
Guiers Mortround trip, via the Boulevard des Tritons and the Escalier Bis
This is an excellent round trip that provides a good opportunity for becoming familiar with parts of the route followed by both the traditional and the P36 traverses from Trou du Glaz. It follows the upper fossil passages all the way to the base of the Cascade de Rocheuse, and returns along the main streamway. It is not a trivial undertaking - it involves 4 km of caving which takes a good six hours, and includes the ascent of four fixed ropes, and the descent of six pitches, some using fixed ropes and some using pull-though ropes (2*20 m). The route is fully described in a Spéléo Secours Isère guide, which has has been loosely translated by the author, and is available here. Use it at your own risk...
Guiers Mort round trip, via the Galerie du Solitaire and the Escalier Bis
This is similar to the above, but follows an alternative route round the fossil series. It is fully described in a Spéléo Secours Isère guide, which has has been loosely translated by the author, and is available here. Use it at your own risk...