There is a lot up there.
There is a great loop over to Strathtay, after a couple of miles towards Weem ou turn up an estate road and up a huge climb which takes you over to Loch Tummel, cross the river via the Coronation Bridge then the singletrack to Faskally and Pitlochry.
There still snow on the tops though.
There is a loop up by Loch Bhac too. Downhill brings you out near Bruar. Worth riding up to see the falls and bridges above the House of Bruar.
Give the guys at Escape Route in Pitlochry a shout. They know pretty much everything there is up there.