Gorge de l'Arly. 13km of heaven. Avoid during peak times, as it's on the main route to Albertville. That also means the road is well surfaced. It runs along a twisty gorge of the Arly river, which would otherwise be quite picturesque. However, I rarely got time to look.

Why is this the most dangerous biking road in the Alps? On the face of it there's a perfect surface and some brilliant bends with good visibility. This road shouts 'Ride me to the limit', but the traffic is frequently going 60 mph slower than you. Long lines of cars and camper-vans crawling around one brilliant bend , followed by another half dozen curves to die for. And die you may. I've made more brainless beyond belief crazy overtaking manouvers on this one road compared to the rest of my 20 biking years put together.DON'T RIDE IT WHEN IT'S BUSY.