Poteschbësch from Syren

At just 1.5km, Poteschbësch from Syren is short but deceptively intense — 66m of elevation packed into a brief, breathless effort. The average gradient of 4.4% disguises ramps of 14.4% — 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 Luxembourg, Luxembourg.