Tour du Mont Blanc at a glance
- Distance: approx. 170 km
- Time needed: 10–11 days (7 with lift assistance or long stages)
- Total ascent: approx. 10,000 m total ascent
- Start / finish: Circular — most start in Les Houches or Chamonix
- Season: Late June to mid-September
- Accommodation: Mountain refuges, gîtes and valley hotels
- Difficulty: Strenuous — 700–1,200 m of climbing most days
Stage by stage
- Les Houches to Les Contamines — 17 km over the Col de Voza or the harder Col de Tricot.
- Les Contamines to Les Chapieux — 18 km over the Col du Bonhomme, the first big alpine day.
- Les Chapieux to Courmayeur — 26 km over the Col de la Seigne into Italy.
- Courmayeur to Rifugio Bonatti — 12 km with the classic Grandes Jorasses view.
- Bonatti to La Fouly — 20 km over the Grand Col Ferret into Switzerland.
- La Fouly to Champex — 15 km of easier valley walking.
- Champex to Trient — 16 km over the Fenêtre d'Arpette or the gentler Bovine route.
- Trient to Argentière — 13 km over the Col de Balme back into France.
- Argentière to Les Houches — Balcony traverse above the Chamonix valley to close the loop.
Why the refuge booking matters more than the walking
The TMB is the busiest hut-to-hut trek in the Alps. Popular refuges — Bonatti, Elisabetta, Bertone, Lac Blanc — open reservations in winter for the following summer and fill within days. Anyone planning July or August should be booking in January or February.
That single constraint dictates the itinerary: stages are shaped by which beds are free, not by the map. It is also the main practical reason people book a guided departure, where the beds are already held.
Variants worth taking
The Col des Fours and the Fenêtre d'Arpette are the two high variants; both are steeper, rockier and worth the effort in good weather. The Tricot variant on day one gives an early close view of the Bionnassay glacier. Bad-weather alternatives exist for every one of them, which is the judgement call a guide is paid for.
Fitness required
A realistic benchmark is being comfortable with 1,000 m of ascent and 6–7 hours of walking on consecutive days while carrying 7–9 kg. The trek crosses no glaciers and needs no rope work, so fitness — not technique — is the limiting factor for most walkers.
Do you need a certified guide on the Tour du Mont Blanc?
The TMB can be walked independently on marked paths. A certified international mountain leader (IML/UIMLA) adds most on the refuge logistics, the daily weather call between high and low variants, and three border crossings' worth of transport. Glacier objectives above the trail — such as Mont Blanc itself — require an IFMGA mountain guide, not a hiking leader.
Tour du Mont Blanc questions
How hard is the Tour du Mont Blanc?
Strenuous but not technical. Expect 700–1,200 m of ascent on most days over 10–11 days, on marked paths with no glacier travel or scrambling required.
Do you need a guide for the Tour du Mont Blanc?
No, it is walkable independently. Guided departures mainly buy you pre-booked refuges, luggage transfer and someone making the high-variant-or-not call each morning.
When should you book TMB refuges?
For July and August, book as soon as reservations open — typically January or February. Popular refuges fill within days of opening.
Clockwise or anticlockwise?
Anticlockwise is the classic direction: the ascents are graded more kindly and you meet fewer walkers head-on. Clockwise is quieter and gives you Mont Blanc in front of you more of the time.