Rockfax Description
III, 500m, 6 - 10 hours. A true alpine classic, the Charmoz-Grépon Traverse remains one of the best mountain journeys in the Alps. The retreat and disintegration of the Nantillons Glacier has made the descent more dangerous than it used to be so think carefully before attempting this line. Get it right and you will be rewarded with a stunning journey through some magnificent rock architecture.
Walk up to the foot of the Rognon des Nantillons and scramble this via broken rock to reach the upper part of the Nantillons Glacier. Climb up the glacier and then cross it towards the start of the Charmoz-Grépon Couloir. Much of the approach above the Rognon is serac threatened so move quickly.
1) Climb the couloir (40 degrees) for 200m then move left out of it onto some large terraces marked with cairns.
2) 4c. Cross the terraces up and leftwards to reach the foot of a long corner and chimney system. Climb this, mostly scrambling terrain with the odd short section of thuggish granite climbing, to reach the Charmoz summit ridge. The most famous section of the chimney system is the Burgener Crack, which feels pretty stiff to those not used to the intricacies of granite thrutching!
3) 4c. Follow the ridge crest and go around the first small tower on the right (4c) before dropping onto the left of the ridge. From here, follow the left of the ridge via the odd technical step (4c) and short downclimb (possible to abseil) to reach the Charmoz summit from the left side of the ridge. Abseil back to the foot of the summit tower and follow easy but sometimes loose rock to reach the top of the Charmoz-Grépon Couloir.
4) 6b. At the top of the couloir, don't descend to the lowest point but instead climb a short corner (4c) on the right of the ridge and then traverse over onto the left of the ridge. Follow a ledge left for 20m. At the end of the ledge, climb up to a gap then go down and left before crossing a slab (4c) to reach the Mummery Crack 10m below its top. The Mummery was originally graded 5b, but most teams agree that it is way harder in modern money. Climb it to reach the ridge crest again.
5) Move back left of the ridge and then climb a crack to reach a 'letter box'. Go through this and onto the right of the ridge.
6) 4c. Follow the ridge crest via some superb flakes (4c) to reach an abseil point. Make a short abseil to a small gap in the ridge. Scramble up the small pinnacle opposite and then make another short abseil onto the right of the ridge. Follow a narrow ledge along before crossing back onto the left of the ridge and continuing along another ledge to a Z-shaped crack. Climb this to the Grépon summit. Give the summit Madonna a peck!
7) Make a 20m abseil onto the left of the ridge then move onto the right and descend (mainly downclimbing, with the odd short abseil) a series of ledges and chimneys to a shoulder. © Rockfax


Rebuffat's 100 Finest Routes in the Mont Blanc Massif , ROCKFAX Chamonix: Top 50 , Big Routes , Alpine Progression , Alps 2023 , BMC - Easier Classics in the Mont Blanc Range


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Guidebooks for Charmoz Grepon

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High TD-
Mid TD-
Low TD-
High D+
Mid D+
Low D+
High D
Mid D
Low D
High 6b+
Mid 6b+
Low 6b+
High 6b
Mid 6b
Low 6b
High 6a+
Mid 6a+
Low 6a+
Style of Ascent
Alt Leads
Not Set
Not Set
Route of Interest
Voie Normale (République)

Grade: D+ 5c ***
(Envers des Aiguilles)

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