WorldwideNetherlandsSouth HollandNoordwijkDe ZilkWorldwideNetherlandsSouth HollandNoordwijkDe ZilkCycling Climbs in De Zilk There are 6 cycling climbs in De Zilk.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.De Zilk - Wassenaarse Slag21.51 km0.1%13 mN/A2.Ruigenhoek, Noordwijk, Zandvoort24.54 km0.1%12 mN/A3.Zuidholland in Noordholland in 15.91 km0.1%10 mN/A4.Ruigenhoek - Noordzee3.93 km0.2%6 mN/A5.Parcour zilk back-wards1.3 km0.1%6 mN/A6.Het bos rondje naar de frietman0.52 km0.2%5 mN/A