The Lances de Malissard are two summits, located in the Chartreuse Mountains in the Department of
Isère
Isère ( , ; frp, Isera; oc, Isèra, ) is a landlocked department in the southeastern French region of Auvergne-Rhône-Alpes. Named after the river Isère, it had a population of 1,271,166 in 2019.French Prealps. More than the peaks themselves, it is the long ridge that is north–south facing, that separate the
col de Bellefond
In geomorphology, a col is the lowest point on a mountain ridge between two peaks.Whittow, John (1984). ''Dictionary of Physical Geography''. London: Penguin, 1984, p. 103. . It may also be called a gap. Particularly rugged and forbidding co ...
and a long alpine valley of another ridge, the Aulp du Seuil, that dominates the Gresivaudan valley. There are two "Lances" (summits) in the Lances de Malissard. The South "Lance" of Malissard culminates at and north "Lance" of Malissard at . The
Guiers Vif
The Guiers Vif (, literally ''live Guiers'') is a river in Auvergne-Rhône-Alpes in eastern France. It is located in the Regional Natural Park of Chartreuse, on the border between the municipalities of Saint-Pierre-d'Entremont (Isère) and Sain ...
rises at the north end of the ridge of the Lances de Malissard.
Caving
An important Speleological network is located under the lances of Malissard and not in the centre of the syncline of the Aulp du Seuil. The Malissard River develops on a north–south axis and exits the karst spring of the Guiers Vif . Its development is for depth. In 1992 the British pass the sump of Guiers Vif cave and make the junction with the Trou of the Flammes discovered in 1973 and located at the top. In 1993 the Tasurinchi chasm was connected to the entrance to the Guiers Vif. Two other chasms, the Ténébreux (−360 m) and the Cavernicole (−362 m), are located above the network but are not connected to the Malissard River.