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DimiTalen · CC0

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How high is the highest dune in the Netherlands, really?

The highest dune top in the Schoorlse Duinen is the Catrijper Nok, at 55.4 metres above NAP. The Klimduin in the middle of the village is 51 metres and is the best known, but not the highest. A third point on the map, labelled 'highest dune of the Netherlands', stands at 53 metres.

Schoorl has advertised the highest and widest dunes in the Netherlands for decades. That is true, but as soon as you ask which dune is exactly the highest, the map gives three different answers.

The three candidates

Point Height Where
Catrijper Nok 55.4 m above Catrijp, eastern part
“Hoogste duin van Nederland” 53 m 52.704, 4.685
Klimduin 51 m in the middle of the village
Schoorlse Nok 48 m further south in the area
Zwarte Blink 31 m to the west, towards the sea

All five are listed in OpenStreetMap with their own height value, including the point literally labelled “Hoogste duin van Nederland” (“highest dune of the Netherlands”). The Catrijper Nok wins at 55.4 metres, and it is also the only one with its own Wikipedia article and Wikidata item.

Why the Klimduin is still the best known

Because you are allowed on it. The Catrijper Nok lies in vegetated dune where you stay on the paths, while the Klimduin is a bare sand slope that ends literally in the high street. You park ninety metres away, walk onto the square and stand at its foot. That explains why everyone takes the Klimduin for the highest point: it is the only tall dune you reach the top of without any effort.

Where the figures go wrong

Note the difference between the height of a dune and the height of a point above NAP (Normaal Amsterdams Peil, the Dutch ordnance datum, roughly mean sea level). The Klimduin is also listed in OpenStreetMap as a viewpoint, at 35 metres. That does not contradict the 51 metres: one figure describes the summit above NAP, the other probably the height measured from the surrounding ground level. Anyone who sees both figures side by side without knowing where they come from wrongly concludes there is an error somewhere.

On this site we hold to 51 metres for the Klimduin and 55.4 metres for the Catrijper Nok, with the source alongside. Where a figure cannot be traced, it does not appear.

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