This is #7 on Cayo's Blackmill Circular Walk which will take you around 2 hours (depending on how good you are).
This is a downhill walk from #6, passing the gated entrance to the forestry on your right hand side and onto a public footpath that can get rather overgrown in summer but is passable (honest!).
You will need to bring your own pencil and possibly tweezers to extract the log!
Vg'f va gur gvgyr.