This is a more serious alpine route than the normal ascent and is known for its rocky ridge character. It involves sustained climbing on mixed terrain rather than a simple snow approach. The route is more committing and requires solid route-finding. Conditions can vary significantly with snow and ice on the ridge. It is suitable for experienced alpinists comfortable on exposed mountain rock. The descent is commonly made by the normal route rather than reversing the ridge.
Route Outline
Approach from the Écrins side to the base of the route.
Gain the Promontoire ridge and follow its rocky line upward.
Continue on sustained mixed and rock terrain toward the upper mountain.
Reach the summit of La Grande Ruine.
Descend by the normal route or as described in the chosen guidebook.
