Between the Dent Parrachée (3,697 m in altitude) and the Pointe de La Réchasse (3,212 m in altitude) this glacial icecap complex extends across approximately 13 km. From the Refuge-Porte de Plan du Lac, with Chasseforêt, Pelve, Arpont ... A full-scale lesson in glaciology is on offer with various glacial forms, moraines and tracks of disappeared glaciers. The tour of the glaciers can be done in 4 to 6 days over marked trails with stopping points at the refuges.