Great biking road which takes you from Blairgowrie over Glenshee and into Royal Deeside. Braemar is a good stopping off point en route. For those who don't want to return via the same route (I think the return journey is even better), the B976/B974 road from Ballater to Fettercairn can be taken which will take you back to Blairgowrie via Kirriemuir.
Beautiful Scottish scenary, great selection of sweepers and climbs and descents. Recommended.
This is part of an alternative route to the A9 north (A939 and A93 being the other parts). It takes you a bit out the way if your heading to Inverness but its well worth it. When I say out the way I only mean about 70km, its nothing for the scenery you will see and the roads are great but watch out for some of the corners.