There are a number of excellent walks which start on the unsealed (and rough) Mt Hay Road, near the Blue Mountains town of Leura. Over 12 years of regular bushwalking in the area I had often noticed cars parked at the side of the road about half way to the end, and wondered whether there was a track there. Well, Sophia and I finally checked it out and discovered the really excellent Fortress Ridge Track. Better late than never. The track undulates through heath and occasional tree cover to a view point over the Grose Valley and Lockley’s Pylon, which is quite spectacular from this angle.
There are nice views for much of the walk, either of the surrounding heathland which is very nice, or of cliffs lining the Grose Valley, and then eventually the Grose Valley itself. Definitely recommended. Other great walks in the area include the track to Lockley’s Pylon itself, and walks starting at the end of the road: to Mt Hay, Butterbox Point, and the more remote Venus Tor.
There are track notes on the Wild Walks website. You follow a fire trail at first, keeping right at a distinct track junction, then again at a rock formation, and on to the viewpoint. The left hand option at that distinct junction is a short side trip to another spot overlooking the Grose Valley, and is worth the visit. Pretty easy walking for 7km; 8-ish with that side trip.