Défi de Derborence is organized in Derborence, it moved to Aven/les Mayens de Conthey for the trail and a departure from Vétroz for the bikes.

The Défi de Derborence is the brainchild of cycling and mountain-racing enthusiasts. Initially organized in Derborence, the race has moved to Aven/les Mayens de Conthey for the trail and Vétroz for the bikes. Four different races and a gourmet E-bike ride are on offer during this edition, dedicated to the memory of Bernard Mayencourt, a founding member of the event.


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