langcliffe
Well-known member
For anyone venturing to Chartreuse this year and wanting to try something new, Spéléo Secours Isère have produced topos for two newly equipped pull-through routes in the Dent de Crolles system. Both of them start in the Gouffre Bob Vouay, situated just 200 m from and 47 m below the summit of the hill.
The first route goes through to Grotte Chevalier, 322 metres lower (although the greatest depth reached is about -460 metres). The second route exits through Trou du Glaz, some 325 metres lower. The latter can be combined with one of the two equipped routes to the resurgence at the Grotte du Guiers Mort, to make it a 681 metre-deep pull-through. I understand that neither of the two routes are easy, involving lots of hairy and arduous meander work.
Loose translations (caveat emptor!) of the route guides have been provided on my Réseau de la Dent de Crolles website, where various relevant surveys may also be found. The following cross-section shews the two routes. Magenta(?) is common to both; red leads to Grotte Chevalier; and blue leads to Trou du Glaz.
The first route goes through to Grotte Chevalier, 322 metres lower (although the greatest depth reached is about -460 metres). The second route exits through Trou du Glaz, some 325 metres lower. The latter can be combined with one of the two equipped routes to the resurgence at the Grotte du Guiers Mort, to make it a 681 metre-deep pull-through. I understand that neither of the two routes are easy, involving lots of hairy and arduous meander work.
Loose translations (caveat emptor!) of the route guides have been provided on my Réseau de la Dent de Crolles website, where various relevant surveys may also be found. The following cross-section shews the two routes. Magenta(?) is common to both; red leads to Grotte Chevalier; and blue leads to Trou du Glaz.