Climb Mont Blanc with a Guide

Most Mont Blanc programmes run over three or five days, and the difference matters more than the price. A three-day ascent assumes you arrive already acclimatised and fit; a five-day programme builds that acclimatisation in, which is why success rates on the longer format are consistently higher.

Depending on the conditions, a five-day programme would normally open on the Italian side. The Skyway cable car lifts you to the Torino hut at 3,375 m, and the first two days are spent moving on the Géant glacier and traversing something like the Aiguille d'Entrèves or the Aiguilles Marbrées. This is partly training — roped movement, crampon technique on mixed ground — and partly a way of sleeping high without a long walk-in. Your guide is also assessing how you move, which determines whether the summit attempt goes ahead at all.

Two routes lead to the summit, and which one you climb depends on the guide and the programme you book.

The Goûter route is the normal way and what most programmes use. From Les Houches the Bellevue cable car and the Mont Blanc tramway reach the Nid d'Aigle at 2,372 m, from where you climb to the Tête Rousse hut at 3,167 m. The following morning crosses the Goûter couloir — the technical and objective crux of the route, usually crossed early while it's still cold, minimising the risk of rockfall. After, you climb the Aiguille du Goûter on steep rock, where the first snow cover is often encountered. A night at the Goûter hut at 3,835 m follows. Summit day starts somewhere between two and six in the morning depending on the forecast and time of year. Roped and in crampons, you climb glacier slopes to the Dôme du Goûter at 4,304 m, pass the Vallot shelter at 4,362 m, and finish along the Bosses ridge — narrow, often corniced, and the part everyone remembers. Descent is by the same route, often with a second night at the Goûter before dropping to the valley.

The Trois Monts route, also called the 4000s route, is the alternative and is offered by fewer guides. It starts from the Aiguille du Midi and the Cosmiques hut at 3,613 m, then traverses Mont Blanc du Tacul at 4,248 m and Mont Maudit at 4,465 m before reaching the summit, usually descending by the Goûter. It is more technical, and it depends heavily on the state of bergschrunds and crevasses on both Mont Blanc du Tacul and Mont Maudit: some years, the route is not passable at all. It also avoids the Goûter couloir entirely, which some people consider its main advantage.

Check which route a programme uses before booking. The Trois Monts requires more confidence on steep glaciers, and guides will generally want to see you move before committing to it.

Ratio is one to one or one to two on the summit day for either route. Hut places at Tête Rousse, Goûter and Cosmiques are limited and regulated, so guides book them months ahead — which is the main reason late enquiries are difficult to fill.

Mont Blanc sits at the high above the Chamonix valley, and the two normal routes approach it from opposite sides. The Goûter route starts at Les Houches, using the Bellevue cable car and the Mont Blanc tramway to reach the Nid d'Aigle, then climbs past the Tête Rousse and Goûter huts. The Trois Monts route starts from the Aiguille du Midi at 3,842 m and crosses Mont Blanc du Tacul and Mont Maudit from the Cosmiques hut.

Acclimatisation days are commonly spent on the Italian side above Courmayeur, where the Skyway cable car reaches Punta Helbronner at 3,466 m and the Torino hut sits at 3,375 m — the fastest way in the massif to sleep high without a long approach. Objectives from there include the Aiguille d'Entrèves, the Aiguilles Marbrées and the Aiguille de Toule. Alternatively, guides may also include Gran Paradiso 4,061m as an acclimatisation summit.

The season runs from June to September. Early season often holds better snow in the Goûter couloir; late August and September bring drier rock but a risk of more rockfall. Hut bookings at Tête Rousse and Goûter are regulated and scarce, and effectively set the calendar for the whole route.