This is one to look forward too after the boring A9. Leave the A9 at Dalwhinnie go through the village and start with the bend that goes completely around the distillery. After this you get a series of fast staights with double bends at the end to take you to the A86 towards Fort William. The road climbs for miles, twisting and turning to Loch Laggan. A fast run alongside the loch, then a final twisting rush down to Roybridge. Be warned, the local police respect skilfull riding, but not speeding through villages. Speed trap regular in the 30 limit at Roybridge. Roybridge Hotel OK, but current owners selling up.
The B4501 has some great bends, some strong drops with tight corners (some with limited visibility) but otherwise good visibility.