L'Ultime Boucle - Backyard Solidaire

In a backyard format every runner starts the same loop at the same time and must be back at the start line before the next hour begins. Anyone who is not ready when the next loop sets off is out of the event. At Vias the loop is about seven kilometres, so the day is measured in hours rather than in finishing times.

It depends which entry you choose. The 80 km entry is twelve loops over twelve hours, the 40 km entry is six loops over six hours, and the 7 km fun run is a single loop completed within the hour.

Yes. Backyard events allow you to stop at the end of any loop, and your result is the number of loops and kilometres you completed. Stopping early is normal and is often the finish for runners who reach their own personal target.

The event is described as solidaire, meaning it is run in support of a cause, with participants and supporters sharing the day in aid of a charitable purpose. Check the organiser's page for the current cause and any donation or fundraising arrangements.

Backyard events usually rely on a staffed or self-service refreshment point at the start and finish area, which you pass on every loop. Confirm the details, and any supplies you need to bring yourself, on the organiser's website.