I've ridden the basic North Third route a couple of times roughly as the route below but I've always felt like I was missing something especially when cycling along the road to the south end of the reservoir. Its a little on the short side too so it would be good to extend the ride a little. Great route though!
There appears to be a few trails disappearing east from the cliffs and plenty of trails on the 1:25K map around Sauchieburn. Is there anything worthwhile in these and can you link up to the end of the reservoir? Or is there anything else I may be missing?

