Citadel van Diest / Allerheiligenberg

At just 0.5km, Citadel van Diest / Allerheiligenberg is short but deceptively intense — 26m of elevation packed into a brief, breathless effort. Averaging 5.1%, the road kicks to 8.1% at its steepest — a notable steepening that demands respect. The 1 hairpin turns break up the climb, each one revealing a new perspective on the road ahead. Located in Flanders, Belgium.