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 license).
- 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 November 9, 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 labeled 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Hut wardens, hosts, hikers: write to us to report outdated information or a missing place to stay.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.