There is a number of great riding roads in the Yarra ranges near Melbourne. I will try detail a few I have ridden but there is no doubt many variations I will miss.
I rode Healsville to Marysville on B360 and C512 routes then C513 and C511 via Reefton to Warburton. I then roade the C425 south which was also excellent.
I would have stayed and explored the many other roads more but it was freezing cold and damp, something I unfortunately encountered the previous time I visited the region too but no doubt it has some fine riding.