Mountain Biking Collection by Hanneke van Haeff
MTB Challenge – the Frans Claes route
2 days
5-5 h/day
137km
1,520m
1,520m
Keen on a challenging long-distance hike on the mountain bike? Discover this marathon route in Flanders, designed by none other than marathon-mountain biker Frans Claes. What started as a lockdown project has grown into a concept among fanatical bikers: 136 kilometers full of variety between technical Singletracks and flowing forest paths, with plenty of elevation.
You start southeast of Leuven and ride through beautiful nature reserves such as the Bertembos towards Tervuren. Here you cross the beautiful Brabantse Leemstreek. Later…
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Frans Claes MTB Marathon Route
137km
1,520m
1,520m
Last updated: August 11, 2025
Activities
69.1km
05:06
720m
720m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
67.7km
05:10
800m
800m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
Collection Stats
Activities
2
Distance
137 km
Duration
10:16 h
Elevation
1,520 m
1,520 m
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