Oisans Mountains
Alpine region in Auvergne-Rhône-Alpes, skiing and mountaineering
A French alpine district in the Dauphiné with high peaks, valleys and ski resorts like Alpe d'Huez. Outdoor visitors come for skiing, mountaineering, glacier routes and cycling stages used by the Tour de France.
Oisans at a Glance#
About Oisans#
Oisans is a mountainous subregion of the French Alps in Auvergne-Rhone-Alpes, centred on the Romanche valley and known for high alpine terrain and glaciated peaks. The area includes parts of the Écrins massif and classic Alpine resorts and villages.
The region supports major outdoor activities across seasons, including summer hiking and mountaineering in glaciated valleys and winter skiing at resorts such as Alpe d’Huez. High mountains and glaciers create pronounced vertical relief and technical climbing routes; the highest nearby summit in the Écrins massif is the Barre des des 4,102 metres.
Historically the area was part of the province of Dauphinin France and its valleys were shaped by repeated glaciations, leaving steep-sided valleys and cirques. Mountain agriculture and pastoral use have long coexisted with seasonal transhumance.
The Oisans region lies in the northern Dauphinne Alps of southeastern France, surrounding the Romanche valley and its access towns.
- Alpe d’Huez climb: The Alpe d’Huez road climb is 13.8 kilometres long and is internationally famous for its 21 hairpin bends used in the Tour de France.
What to See#
- Alpe d’Huez: A major ski resort and tourist town that sits above the Romanche valley; the road climb to the resort is 13.8 km long and is famous for its 21 hairpin bends used repeatedly in the Tour de France.
- Barre des des : The highest summit in the broader area, rising to 4,102 metres and forming part of the Écrins massif; it is the most prominent peak near the Oisans region.
- Romanche valley / Bourg-d’Oisans: The Romanche valley and its towns, including Bourg-d’Oisans, form the central transport corridor and base for access to alpine valleys, glaciers and climbing routes.
How to Get to Oisans#
Oisans is typically reached from Grenoble via the Romanche valley (D1091) toward Le Bourg-d’Oisans and then up to alpine access points. Regional buses and mountain shuttle services operate in summer; private car allows access to remote trailheads.
Tips for Visiting Oisans#
- Use a regional bus or hire a car from Grenoble if exploring the massif's higher trails-public transit serves main valleys but not all trailheads.
- If planning mountaineering routes, study seasonal avalanche reports-Oisans has serious winter hazards.
Best Time to Visit Oisans#
Summer for hiking and climbing, winter for skiing; shoulder seasons require local route knowledge.
Weather & Climate near Oisans#
Oisans's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with cool summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -6°C to 19°C. Abundant rainfall (1330 mm/year), wettest in November.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -6° - 0° | -8° | 125 mm | - | - | 3.9 m/s | - | - |
| February | - | -6° - 1° | -8° | 109 mm | - | - | 3.8 m/s | - | - |
| March | - | -4° - 3° | -5° | 102 mm | - | - | 4.1 m/s | - | - |
| April | - | -2° - 6° | -2° | 98 mm | - | - | 4.2 m/s | - | - |
| May | - | 2° - 12° | 4° | 112 mm | - | - | 3.8 m/s | - | - |
| June | - | 5° - 15° | 10° | 101 mm | - | - | 3.7 m/s | - | - |
| July | - | 8° - 19° | 14° | 69 mm | - | - | 3.7 m/s | - | - |
| August | - | 9° - 19° | 14° | 87 mm | - | - | 3.5 m/s | - | - |
| September | - | 6° - 15° | 10° | 105 mm | - | - | 3.6 m/s | - | - |
| October | - | 2° - 10° | 3° | 131 mm | - | - | 3.7 m/s | - | - |
| November | - | -2° - 4° | -3° | 153 mm | - | - | 4.1 m/s | - | - |
| December | - | -5° - 1° | -7° | 138 mm | - | - | 3.9 m/s | - | - |