Col de Croix de Fer - mountain pass
A must for cycling fans in the Alpes.
A beautiful tour in the Eau d'Olle Valley that will lead you to the borders of Oisans on the Savoy side. The climb is steep up to the Lake Grand Maison. Your calf muscles will certainly remember some of the sections. But once on the top, what a joy!
Route details
From Rochetaillée, take the D526 towards Allemond/Col du Glandon - Col de la Croix de Fer". At the first crossroads, turn right onto the D44.
From Lac du Verney dam, take the D526 and cycle along the lake.
At the end of the lake, start the steady ascent up the D536 to Rivier d'Allemond.
At Rivier-d'Allemond, go back down a few hundred meters to continue with the demanding ascent to the Lac de Grand' Maison.
From there, it's an easier ride to the Croix de Fer pass.
On the way back, take the first right up to Glandon pass - it would be a shame to miss it while you're here!
Opening
From 15/05 to 31/10 daily.
Subject to favorable weather.
Go there
Latitude : 45.114234
Longitude : 6.005749
Height : 715
D526
Rochetaillée
38114 Allemond
Go there
You can start this ascent from Le Bourg-d'Oisans.
Buses run between Grenoble station and Le Bourg-d'Oisans:
- regular bus line: car Région T75 (to/from Grenoble)
- regular bus service: Zou bus line LER 55 (to/from Grenoble or Briançon)
Vehicles on these routes are equipped with bike racks. Please enquire in advance.
Information updated on 24/08/2026
by Isère Attractivité
