For reference, that image does not show a dedicated downhill MTB trail (which I believe you are calling a “race”). It’s slightly downhill in the part photographed – no more than 100m long – then levels out, climbs, makes a turn, and is flat for quite a while. It’s also a hiking trail and designated for both pedestrian and bicycle use.
It’s as much of a footway as it is a cycleway. But mostly it’s a path through the woods where cycling and hiking are specifically allowed, with both having equal access.