A popular place for mountain-biking and bushwalking, Blackwall Mountain is home to the Webb Trig and the Blackwall Mountain Lookout. However, the sandstone block construction on the mountain is not the Webb trig station – the original trig appears to have been removed or destroyed.
The Blackwall Mountain Plan of Management refers to a trig station at a height of 111m above sea level “at the highest point located on the southern side of the reserve” and “The location of this trig station is poorly marked on the ground”. It likely got its name from Webbs Reef, the passage between Daleys Point and Orange Grove which is now known as The Rip.
There is no evidence of the original trig, which would have been located about 265 metres to the west of the stone cairn. A graffiti-covered steel drum is at spot where the trig should be.