The "Dutch hills", in the very south of Limburg, are the Netherlands' only hilly region. The chalk-loess relief was formed by the foothills of the neighbouring Ardennes and Eifel low mountain ranges. The hills define the character of the race: they are generally shorter and not as high as in the Ardennes, but come in much higher frequency than in Liège–Bastogne–Liège. The highest point of the region and the race is Vaalserberg at 322.7 m above sea level; the top of the Cauberg is at 133.7 m altitude.