In reply to Dan Bailey - UKHillwalking.com:
I believe that it is possible to avoid the hideous boggy path by staying on the track to its end at NN383232 and then heading uphill from there.
> The same circuit can be done with a start in Glen Falloch. It's been some time since I did it, and I can't be > sure of my precise starting point, but I suspect it would be somewhere near grid reference 370 238.
Yes, that's also an option, using the bridge at NN379228 to access the slopes of Grey Height. It's the usual start point for An Caisteal and Beinn a' Chroin. Making the circuit would require walking about a mile along the A82.
Post edited at 10:22