At 3,096 metres, Mont Buet is the highest peak in the Giffre massif, known historically as the Women's Mont Blanc — not because it is easy, but because it was one of the first high Alpine summits regularly climbed by women in the 18th and 19th centuries. The standard route from Sixt climbs via the Refuge du Grenairon; expect a full day with around 1,900 metres of ascent. A short boulder field and a small snow patch near the top mean an ice axe is worth carrying, though crampons are usually unnecessary in summer. The reward is a 360-degree panorama that takes in the entire Mont Blanc massif directly across the valley.
The mountain has a distinguished scientific history: Genevan naturalist Jean-André Deluc first climbed it in 1770 as part of his barometric research into altitude measurement, laying groundwork for later ascents of Mont Blanc itself. The summit panorama drawn by Marc-Théodore Bourrit in 1776 is considered the first true 360-degree Alpine panorama ever published.