This ride starts at the Amstel Gold Race centre, with a flat first Km. As soon as you are out of town there is a nice ascent to Walem, but watch out because the end is a potential leg breaker.
Sibbe grubbe is one of the three climbs which also appear in the final of the Amstel. Sibbe is more of a tempo climb. Cauberg will hurt your legs big time. Can you imagine that Gilbert averaged more than 35Km/h during his world championship climb in 2012?