I have added the 5 randonnée routes, but could you check on the mtb:type (as the values are not properly described on https://wiki.openstreetmap.org/wiki/Key:mtb:type ) and other things on those routes? There is also some trajectory missing southeast of Valpreveyre of the route 55 (Grand tour de Gilly).

The routes are:
51 https://www.openstreetmap.org/relation/19586576#map=15/44.80290/6.93779
52 https://www.openstreetmap.org/relation/19586577
53 https://www.openstreetmap.org/relation/19586578
54 https://www.openstreetmap.org/relation/19586580
55 https://www.openstreetmap.org/relation/19586579

Regards, IIVQ