The Muur van Geraardsbergen (English: Wall of Geraardsbergen/Grammont, French: Mur de Grammont) is a steep narrow road with cobblestones in Geraardsbergen, Belgium. It is also known as Kapelmuur, Muur-Kapelmuur or simply Muur. The hill starts near the river Dender at 18m and reaches the top of the Oudenberg at 110 m after 1,075m at 9.3 per cent. This climb is often part of the Tour of Flanders professional cycling race.