GR91 — Traversée des Hauts-Plateaux du Vercors conditions today
Vercors · Hauts-Plateaux · Darbounouse · Isère & Drôme
- Villard-de-Lans road (D531): low rain-triggered disruption risk (31 mm / 96 h near Corrençon-en-Vercors)
- Little rain on the steep valley sections — low rockfall/landslide trigger risk
Best day to go
Best: Tue 13 Oct (100) — Villard-de-Lans road (D531): low rain-triggered disruption risk (3 mm / 96 h near Corrençon-en-Vercors)
What's limiting the score
Huts, cols & altitudes
The wildest part of the GR91: from Corrençon-en-Vercors across the Hauts-Plateaux nature reserve — the largest in mainland France — by the Cabane de Carrette, the Darbounouse meadows and the Jasse du Play, down to Châtillon-en-Diois. There are only basic unstaffed cabins. Weather risk is fog on the featureless karst plateau (navigation), storms, and heat; the plateau is snow-covered in winter.
low 4°
low 3°
low 3°
low 1°
low 6°
Bookings, access & safety
GR91 — Traversée des Hauts-Plateaux du Vercors questions
- Is the GR91 — Traversée des Hauts-Plateaux du Vercors open right now?
- No closure is currently reported in the news and official sources we monitor. The live score is 100/100 (Excellent).
- When is the best time to walk the GR91 — Traversée des Hauts-Plateaux du Vercors?
- Best season: June – October. Check hut opening dates, and expect afternoon thunderstorms in summer and snow on the high cols outside it.
- How high does the GR91 — Traversée des Hauts-Plateaux du Vercors go?
- The highest point we track is Jasse du Play (cabin) (1,629 m). No overnight stop is above 3,000 m; the challenge is the daily climbing and weather on the cols.
- Do I need a permit or bookings for the GR91 — Traversée des Hauts-Plateaux du Vercors?
- Hauts-Plateaux nature reserve rules — Bivouac is regulated (one night, near the cabins or away from tracks) and fires are banned — confirm the current rules with the Parc naturel régional du Vercors. Rules change — confirm with the refuges and park authorities.
- Where does the avalanche level come from?
- From the official Météo-France avalanche bulletin (BRA) for the massif — or the Swiss SLF bulletin on Swiss stages — whenever one is in force (early November to early June). Otherwise the level shown is a model estimate and is labelled as such.
- How is the GR91 — Traversée des Hauts-Plateaux du Vercors score calculated?
- Hourly forecasts for every waypoint, corrected to its real altitude (MET Norway Locationforecast), feed six factors: weather on the cols (wind, cold, cloud, thunderstorms), snow and avalanche danger, rain against published European landslide thresholds, trail weather, views and access. Météo-France orange/red warnings, flood vigilance and credible closure reports cap the score.
Weather forecast from MET Norway (CC BY 4.0). Not an official forecast. Always follow Météo-France warnings and avalanche bulletins, préfecture and park notices and refuge guardians. Emergency: 112.
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