Fontenelle from Bonlez

At just 1.2km, Fontenelle from Bonlez is short but deceptively intense — 50m of elevation packed into a brief, breathless effort. The average gradient of 4.3% disguises ramps of 10.1% — 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.