This should really go in both categories of cols over 1000m, and Diversions. I planned it as a diversion from the straight descent from col de l’Allimas and Gresse-en-Vercors northwards (I’ve only ever ascended that bit) – it is certainly a fabulous diversion, and has little ascent to the col before descending, when coming from Gresse.
However, it’s also a corker of a col (which you’d really be aware of) coming from the St Andéol/St Guillaume end, with a real sting in the tail.
Anyway, whichever way you do it, it’s a splendid diversion, running parallel to the eastern ridge of Vercors, with stunning views of its craggy and imposing face.
If you like road numbers, it’s the D242, and I cut through to St Guillaume on the D242a, as my legs were asking to go home by then. And I had enough photos.