The "Sma Glen" to Loch Tay.
A lovely spin out. I have spent many a day chasing Dofe groups there on bike.
The estate at North end is welcoming, the chap who owns shooting rights less so. South estate is more grumpy, and again estate shooting rights are leased to all sorts, some of whom have been right grump bags.
A word of warning - we went in and helped groups over the rivers in heavy rain - a couple of the innocuous streams become landy 110 bonnet depth...
An even finer loop can be had taking the track as far as the inlet for the hydro, crossing the inlet then climbing the most ridiculous fire road ever to the watershed to the east of Ben Chonzie. Then either taking in Ben Chonzie (Great decent) or descending into Glen Lednock. Lots of singletrack on the north side of Strathearn takes you back along to Loch Turret and eventually back into Sma' Glen. Cracking day out.
As for the Glen Almond route, I did it on a loaded cross bike with slicks, so no excuses 😉