In July 2019 I did a three day cycle trip across the Netherlands using my Nano-Brompton and going from the Port of Tyne with DFDS ferries to IJmuiden on the Dutch coast west of Amsterdam. From there I spent three days heading via Utrecht to Arnhem on the edge of the very popular Hoge Veluwe National Park.
You can find a full account of my trip here and some route stats and links to GPX files below:

DAY 1 IJMUIDEN TO AMSTERDAM
27 miles / 44 km
GPX file here

DAY 2 AMSTERDAM TO UTRECHT
35 miles / 56.5km
GPX file here

DAY 3 UTRECHT TO ARNHEM
55 miles / 89km
GPX file here