We woke up to clouds and were unsure whether to walk directly to Cretaz or do a variant, an easy path that leads up to Petit Tournalin, a peak at about 3100m. At Col de Nannaz at 2775m we decided not to go up to the peak, because we were not completely at ease with the dark clouds and the possibility of thunderstorms. The climb up to the pass is very very nice and the pass itself also. Rough and alpine.