I agree. I did this trip late August-22. I kept the east side of Tinn to Austbygd and a small road from Rødberg to Haglebu and down Eggedal and Sigdal. This is shorter and more interesting curves for mc.
BjotolThis is a perfect daytrip, but with over 400 kilometres you need to leave not too late in the day. Approximately 6,5 hours with just pure and fun driving + stop. A lot of places to stop to enjoy the absolutely amazing scenery, and good places to eat as well. This roundtrip will not disapoint you! Enjoy the ride!
Stian