Belach na Baa is a good one, but I have a picture of Glen Quaich.

In general its a lovely single track through the valley and over the moors road. Then there are the 2 haipins in the middle and at the N end on the way into Kenmore, you drop about 1000 ft in under a mile. I boiled the back brake of my old F650 on that trailing it the rear brake down through the gravel strewn hairpins.