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Tour du Mont Blanc

Tour du Mont Blanc — the trail guide

The Tour du Mont Blanc is a 166.0 km trek in France, typically walked in 10-11 days, with 10304 m of total ascent. It rates Extreme on our published rubric (62 m of gain per km, topping out at 2534 m). Its operating periods and current access must be checked with the linked route authorities; historical climate averages cannot establish whether the route is open or passable.

A roughly 170 km circuit of the Mont Blanc massif through France, Italy and Switzerland, linking mountain refuges and valley settlements across a series of high cols.

Quick facts

Distance166.0 km
Total ascent10304 m
Typical duration10-11 days
Difficulty (computed)Extreme
Steepness62 m gain per km
High point2534 m
CountryFrance
RegionFrance/Italy/Switzerland

Difficulty is computed from gain-per-km and maximum altitude on a published rubric, identically for every trail in the catalogue — so an "Extreme" here means the same thing everywhere on DirtbagMaps.

Official planning information

Elevation profile

Low point 980 m · high point 2534 m · 10304 m total ascent over 166.0 km.

Historical climate normals — month by month

ERA5 reanalysis averages (2015–2024) for the trail area, referenced to approximately 987 m elevation. These are gridded historical estimates, not observations from every stage and not a forecast. They cannot show current snowpack, river levels, fire restrictions, closures or whether a pass is safe.

MonthAvg highAvg lowAvg precip
Jan-5°191 mm
Feb-3°135 mm
Mar-1°170 mm
Apr12°140 mm
May16°229 mm
Jun21°11°175 mm
Jul24°13°137 mm
Aug23°12°129 mm
Sep19°134 mm
Oct16°132 mm
Nov162 mm
Dec-3°197 mm

Frequently asked questions

How long is the Tour du Mont Blanc?

The Tour du Mont Blanc is 166.0 km, and most hikers complete it in 10-11 days. Total elevation gain is 10304 m.

How difficult is the Tour du Mont Blanc?

It rates Extreme on DirtbagMaps' computed rubric: 62 m of climbing per km walked with a high point of 2534 m. The rubric classifies every trail from gain-per-km and maximum altitude, so ratings are comparable across the whole catalogue.

What season and condition information is available for the Tour du Mont Blanc?

2026 hut-booking calendar: July–September. The official TMB association booking calendar lists participating huts in July–September 2026. That describes bookable hut support, not a route-wide opening date. This note was reviewed 29 Jul 2026 and is not live status; re-check the linked authorities before booking and departure.

Where is the Tour du Mont Blanc?

In France/Italy/Switzerland, France. The route starts near 45.892, 6.799 — the interactive 3D map above shows the full line, and the planner splits it into daily stages.

Can I get the GPX and plan daily stages?

Yes. Open the trail in the DirtbagMaps planner to drag the elevation profile into daily stages, see huts and accommodation along the corridor, and export a per-day GPX for your watch or GPS.

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