A track also goes west around to the Ruined Castle and Mount Solitary. The track continues across the mountain but is patchy and suitable only for experienced walkers. It is possible to then go up to Kings Tableland and into Wentworth Falls, making a trek of at least three days. The tracks closer to the escarpment are suitable for one-day walks. Mount Solitary is used mostly for camping trips, although some walkers have been known to make one-day walks to the mountain.In this part of the valley there was formerly a sewage treatment plant, not far below the northern escarpment. It was serviced by a dirt road that went up to Kings Tableland and thence to Wentworth Falls town. The plant was closed down in the 1990s, but the service road remains and can be used by bushwalkers.