Nice pass but quite difficult all the same! From Vertolaye 13.8 km of ascent for an average gradient of 6.5% and 9% max.
An inn at the top is open year round for a little refreshment!!
Spectacular, the Valley of Factories is a pleasant way to climb to the summit of Thiers while avoiding main road traffic. The richness of the industrial heritage is remarkable.
For a magnificent longer hike: From Hell to spinning wheels livradois-forez-rando.fr/pedestre/de-lenfer-aux-rouets Also visit the cutlery museum in Thiers (almost 3 hours). In total a busy day to visit thiers and the valley, super interesting and beautiful