Starting from the Boxvale Tramway Walking Track car park off Boxvale Road, Mittagong, this walk takes you on a circuit past the Nattai Gorge Lookout and Forty Foot Falls via the Boxvale Loop. This challenging hike follows the route of a historic railway line used to transport coal from Welby to the Nattai escarpment in the 1800s, passing the Nattai Gorge Lookout, then descends steeply into Nattai Gorge and follows the Nattai River, passing Forty Foot Falls. The walk initially crosses the Nattai and Kells creeks, passing through lush forest, fern-lined valleys and along paths carved out between the cliffs. After passing through an 84m long tunnel carved through the rock, the walk reaches the signposted location of the 'Incline', where the coal was brought up from the gorge. Shortly ahead, the walk passes a side trip to the Nattai Gorge Lookout, which offers stunning views over Nattai Gorge, the Nattai River and towards the Blue Mountains. After visiting the lookout, adventurous bushwalkers can tackle the steep cable-assisted descent into Nattai Gorge. At the bottom, the walk crosses the Nattai River and meanders through the gorge, guided by occasional signs and markers on trees. After crossing the river a second time, the walk follows Nattai Creek to the spectacular Forty Foot Falls, which has a cave behind the cascade. From there, the walk climbs steeply out of the gorge via a series of ladders and steps, passing a lookout above the falls, then follows a wide fire track back to the car park. This walk consists of wide and narrow walking trails and fire tracks, with uneven natural surfaces, compacted natural surfaces, off-track sections, rock scrambling sections, creek crossings, steep hills and steps. Suitable for high fitness levels. Let us begin by acknowledging the Gundungurra people, Traditional Custodians of the land on which we travel today, and pay our respects to their Elders past and present.