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!
Marking : White and green signs for "Col de la Croix de Fer"

Admission fee : Free access.

Opening : From 15/05 to 31/10. Subject to favorable weather.

Area : Oisans