previous comment is spot on, one for a trailie, I rode it on an Africa Twin and it was perfect. Bumpy, sketchy surface, lots of bends and poor visibility. Popular with horses and cyclists so take it easy and enjoy. I´m
Not a bad route for the right bike. It is too bumpy to enjoy on a sportsbike or supernaked bike, but a sports tourer or cross-over/trailee style would be OK.
The bends past the White Horse are good but visibility is restricted and there is often loose gravel on the road, so beware.
Not a flat-out burn - too narrow and too many iffy bits of surface - but some great slow-speed corners down here in the vale of the white horse, particularly the little complex of esses below the Dragon Hill! And you can see the white horse itself etched in the hill on the right on the way back :-)