Most of the climbs are located in a relatively small area, causing the roads to turn constantly and often abruptly, which explains the winding and irregular trajectory of the finale. The Oude Kwaremont is the longest climb at 2.2 km: an atypical hill because it is not very steep, but considered one of the most arduous climbs in Flanders because of its length and cobbled surface. The steepest of all is the fully cobbled Koppenberg, 600 meters in length with grueling stretches of 22% over a poorly paved narrow road.