Where does our data come from?
- Accommodation: 154 establishments checked one by one against their official websites, the platform of the TMB hut wardens’ association (montourdumontblanc.com), tourist offices (Chamonix, Courmayeur, Aosta Valley, Pays du Saint-Bernard, Trient valley), refuges.info and OpenStreetMap. Every page cites its sources.
- Routes: the main route and official variants as mapped by OpenStreetMap contributors (ODbL licence).
- Altitudes and ascent: the European digital terrain model EU-DEM (Copernicus) at 25 m, sampled every 50 m along the trail. Ascent is calculated with a 10 m filter to remove terrain noise, which gives slightly lower values than some guidebooks.
- Walking times: DIN 33466 standard (4 km/h on the flat, 300 m/h uphill, 500 m/h downhill), excluding breaks.
- Practical information: official sources (municipalities, prefectures, transport and lift operators), cited at the bottom of each guide.
Updates
The data was last checked on 9 November 2026. We review it before every season and as soon as a significant change is known (hut closure, diversion, new regulations).
Independence
No establishment pays to appear on this site or to be ranked higher: accommodation is listed in route order. The site is funded by advertising, clearly labelled as such.
Spotted an error or something missing?
Hut wardens, hosts, hikers: write to us to report outdated information or a missing place to stay. We correct things quickly.