The Frans Claes MTB Route is the longest MTB route in Flanders.  We only keep FKTs for running the route (not biking).

https://sporza.be/nl/2021/09/06/frans-claes-opent-de-langste-mountainbikeroute-van-vlaanderen-136km-en-bijna-2000hm~1630936118886/

A route around Salisbury with links to the Avon Valley Path, Clarendon Way and Monarch's Way with visits made to South Newton, Alderbury, Charlton and other villages.

https://ldwa.org.uk/ldp/members/show_path.php?path_name=Sarum+Way

*On the LDWA site it has it down as 50km but in reality it’s around 53km. Also it has the start/finish as being in Lower Woodford but with this being a loop you could start at any point providing you complete the full loop.