Col du Coq Road Closure
Following a landslide on the night of 10 December 2017 when a section of the road fell into the stream, the Col du Coq is currently inaccessible from the west (St Pierre de Chartreuse) side. It remains accessible from the east. The good news is that there is a commitment to rebuild the road, but it is unlikely to be open again before 2020. See here for the latest information as of June 2018.
The closure obviously makes access to the start of the three walks starting from the col du Coq difficult if staying in or around St. Pierre de Chartreuse, although access is still available from Perquelin, which requires a longer day.
Further news will be provided when available from the municiple.