Raid des Hautes Fagnes 2014admin2023-02-21T22:10:11+01:00 Raid des Hautes Fagnes The RDHF is the best mountain bike marathon race in Belgium. 3 races of 64 (1925 hm), 92 (2580 hm) and 116 km (3130 hm) will enable you to compete against the best bikers.