There is no longer a bridge on the old rail path over the stream at the ruins of Glenlochsie Lodge, just before it rejoins the land rover track.
There are some useful stones and some shallow patches so it is not too bad - but an unwelcome surprise when you are expecting a bridge.
The old rail path section was very muddy on the day of my walk but other than the problem above, a walk up Glas Tulaichean only and back is good exercise with minimal navigation.