I've done most of this walk several times over, but not the whole thing. On a clear fine day, we had lunch at the Falls of Dochart inn and Donna then drove me to the start at the foot of the track that climbs up to Lochan Breaclaich. ThInking the ground by the lochan would be very boggy, I decided to leave the track early - which In retrospect was probably not the best. I'd printed out a paper map of the section as far as the big track in Glen Beich - but forgot to bring a compass . The trouble with moorland is often it looks like "The Universe" - the same in all directions . However I found my way to a 490m cairn on a fenceline and on due S to a second cairn whence I could see the track. Descending to it, I noted that crossing the river if it were in spate could be quite a problem, but once on the Landrover track I made good speed home. The track that runs down the W side of Glen Tarken is deteriorating, and if I repeated the walk I would head N and E of Creagh Dhubh and take the much better track on the other side of the glen
A better but longer walk would probably be to follow the Rob Roy Way well past the lochan and traverse both Meall Daimh (693m) and Creag Ruadh.
Sorry I didn't take any new pics
Edit
But I have found some pics of Glen Tarken - most looking up. towards Creagh Dhubh and roughly in descent order
Glen Tarken is a wild but not very picturesque glen: the glacier that gouged it out in the ice age was not powerful enough to create a lochan at ithe head: instead there is a "Moss" - mostly deep bog but with hard heathery lumps that I guess were drumlins. The track circles round the firm ground outside the Moss











Looking across Glen Tarken burn



Jerusalem

Heading downinto Glen Tarken woods