Roll out of Oud-Zuilen and past Slot Zuylen castle, then on to Trompenburgh castle before the woods of Landgoed Spanderswoud take over. Boekesteyn and Kasteel Groeneveld castles follow, then it's Roosterbos, Koningin Emmapark and Vijverhof, all nature reserves. With 64.9 km ahead and barely any climbing, the pedalling stays easy. The surface is 96% paved, with a touch of unpaved, and the route loops you back to Oud-Zuilen.