Head up Glen Banchor. Can be a couple of reasonable fords when it’s been raining.
Along towards Kingussie for Loch Gynack and Creag Bheag
Go south down NCN7 to the A9 and Ralia then cross the A9 to Etteridge or Phones. You can follow the old Wade Road north towards Ruthven Barracks. At the A9 crossing, go straight across, follow the grassy hard shoulder for 100m or so then through a gate. That takes you back under the A9 almost at Ruthven. Head back to Kingussie down the road and then the segregated cycle path.
Laggan isn’t too far away.
If you don’t mind a bit of road bashing, head past Ruthven to Tromie Bridge and Drumguish. Take the Badenoch Way and then explore all the woody singletrack behind Inveruglas and Insh. There’s some really nice stuff around Creag Dubh.