Most of the rock climbing in the Argentière basin is on beautiful granite on the east side of the glacier. It can be reached most easily by taking the lift to the top of Grand Montets and then skiing (in the spring) or hiking (summer) across the glacier.

The Refuge d'Argentière sits below the Auguille du Refuge and offers easy overnight stays. Alternately, access in the spring via ski allows single day hits with time to make it back down to the valley floor.

There is a great guidebook by JMEditions: Mont Blanc Granite - volume 1 Argentière Basin.

For ice/mixed/snow climbs, see: mountainproject.com/v/argen…

Take the cable car to the top of Grand Montets an then cross the Glacier des Rognons. In summer it is usually crossed more or less directly across from the cable car. In spring, via ski, it is more common to stay high on the west side and traverse below the Aiguille Verte before cutting across the glacier. Either way, you are crossing a glacier and appropriate safety procedures are needed.