The south face of Aiguille de Leschaux is a serious alpine route on a steep, glaciated mountain in the Mont Blanc Massif. It is a mixed snow-and-ice climb with objective hazards typical of high alpine faces, including serac fall, avalanche risk, and changing ice conditions. The route is generally considered a technical mountaineering line rather than a straightforward snow ascent. Conditions can vary substantially from season to season, so the difficulty and commitment depend heavily on the state of the face. It is a well-known objective in classic Mont Blanc guidebooks and is climbed as a full alpine outing. Because published sources vary on exact line choice and timing, no specific documented figures are given here.
Route Outline
Valley approach to the Glacier de Leschaux or nearby bivouac/hut access
Cross glacier terrain to the foot of the south face
Climb the south face on mixed snow and ice lines
Gain the summit ridge and follow it to the summit
Descend by the same route or an appropriate glacier descent
