To give you guys an idea of the dutch hills... This is the route of the Elfstedentocht (eleven cities tour): a famous ice skating race last held in 1997 : r/bicycling
Doen in Friesland: rijd de Elfstedentocht per camper
Route Elfstedentocht — Waarkanikschaatsen
Patrick Henry 🇺🇦 on Twitter: "#Elfstedentocht route but apart from covid19 it looks like the 200 mile rink will start to melt thereby making the national event unlikely because the ice must