The short, sharp hills in the Flemish Ardennes are a defining feature of the Tour of Flanders and the locations where spectators gather in large numbers. Each climb has its own characteristics with varying gradients and surface, presenting different challenges to the riders. The Kwaremont is 2.2 km long with an uneven cobbled surface, but is relatively shallow in gradient. The Paterberg is short and, at 20 percent, the steepest climb of the women's race.