Rue de Montzen from Viaduct de Moresnet

At just 1km, Rue de Montzen from Viaduct de Moresnet is short but deceptively intense — 41m of elevation packed into a brief, breathless effort. The gradient averages 4.2% — manageable for most riders, though the cumulative effort builds. It's over before the legs know what happened — a short, explosive effort where momentum is everything. Located in Wallonia, Belgium.