Côte de la Basse Boulogne from Audregnies

At just 1km, Côte de la Basse Boulogne from Audregnies is short but deceptively intense — 41m of elevation packed into a brief, breathless effort. The average gradient of 4.1% disguises ramps of 11.1% — the kind of gradient that turns plans into prayers. It's over before the legs know what happened — a short, explosive effort where momentum is everything. Located in Wallonia, Belgium.