Cobbled Koppenberg from the legendary cycling race T-Shirt

The Koppenberg literally "Heads Mountain" is a 77 m (253 ft) high hill in Oudenaarde, the Flemish Ardennes, Belgium. "Koppen" is an abbreviation for cobblestones which in Dutch slang language are called kinderkoppen, or "children's heads". This climb is part of the route of some of the hardest professional cycling races in the world feared by many cyclists for its 22% ramp and because of its cobblestones. Quite often, riders slow to the point of losing their balance, especially those at the back of the peloton who have to dismount and scramble to the top on foot.