Allée de Clerlande from Ottignies

At just 1km, Allée de Clerlande from Ottignies is short but deceptively intense — 60m of elevation packed into a brief, breathless effort. The average gradient of 6% disguises ramps of 13.5% — 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.