The road of the Molenberg has a roughly-paved cobbled surface, which is classified and protected as a landscape monument.

[1] The hill is best known from road bicycle racing, where it is a regular climb in the Flemish races in spring, most notably the Tour of Flanders.

It is one of the most iconic climbs in the region, because of its steep slopes and narrow badly-surfaced cobbled road.

Its average gradient is 7% with its steepest point, 14.2%, in the middle of the climb in a right-hand bend.

[2] The climb is also regularly included in the Omloop Het Nieuwsblad and the Tour of Flanders for Women.