Lier and Modum, Fv 284, Buskerud, Norway. 33,5 km
I recommend you to ride it both ways. And a perfect way to end a summer afternoon is to take the ride from Vikersund to Sylling. The road is demanding and entertaining and if you show some respect this road is a rewarding experience.
o top the afternoon ride you can do the Fv 285 from Sylling to Skaret.