This is one of the posted MTB rides they have in Waimes near Malmedy. From memory this was a grade 1 route - easy. It's OK if you've nothing better to do, but I only did it twice and never bothered again. Harder than the length suggests, as for much of the time you ride in long wet grass, but more boring than the terrain reads. One good little downhill section towards the end, but honestly the return isn't worth the effort.