Are horses really allowed here? IIRC there is a cycle and pedestrian track sign from the Brussels side, and a cycle track sign from the Flemish (Vier Armen) side. I haven't seen any horses on it, and they would be bad for the compacted surface. It's also not included as a bridlepath on the map (https://sonianforest.be/wp-content/uploads/2020/12/BIM_ZONIENWOUD-V2020-WEB-copy.pdf).