VISITWallonia.be offers a collection of cycyling loops for MTB and touring bikes :
https://visitwallonia.be/fr-be/3/jaime/wallonie-a-velo/carte-des-balades-a-velo
VISITWallonia.be offers a collection of cycyling loops for MTB and touring bikes :
https://visitwallonia.be/fr-be/3/jaime/wallonie-a-velo/carte-des-balades-a-velo
Road and gravel cycling loops for the enthusiast cyclist
Cycle touring routes based on the node points (Fietsknooppunten).

Cycle highways – a network of fast cycling routes present in Flanders and Brussels Region.

RAVeL (Réseau Autonome des Voies Lentes) – a network of greenways from Wallonia that were built in place of ancient railway lines and towing paths along waterways.

MTB routes with various difficulty levels, grouped by location. They can be downloaded and imported in navigation apps like Komoot, RouteYou, and others.
https://www.sport.vlaanderen/ik-wil-mountainbiken/vind-een-mountainbikeroute/