Oisans Col Series reserves sections of the road or a col to Alpe d'Huez for cyclists who will gather to tackle a part of the famous climb of the 21 bends without any motor vehicles.
You can find out which section or col is to be ridden by checking the website link above.
It's free, untimed, and no registration required. Food and drink offered at the top. In case of very bad weather conditions, the event may be cancelled. Riders should obey all traffic laws and ride safely.
From 09:00 to 11:00.