Along the Great Western Highway, about 2.5km west of Katoomba train station, is the Explorers Tree, inscribed with the initials of Blaxland, Lawson and Wentworth during their famous 1813 expedition. From Nellies Glen Road here is the start of the 42km Six Foot Track to the Jenolan Caves (2–3 days; carry plenty of water) and shorter walks to Pulpit Rock and Bonnie Doon Falls. There are four basic campsites along the way, plus well-equipped cabins at Binda Flats. Blackheath NPWS (02 4787 8877) can provide more bushwalking and camping information. Blue Mountains Guides (02 4782 6109, bluemountainsguides.com.au) offer a guided walk along the track. Otherwise, Fantastic Aussie Tours provide a return service from Jenolan Caves for those who have completed the walk. A more unusual way to do the track is to enter Australia’s largest annual off-road marathon, the Six Foot Track Marathon held in March (coolrunning.com.au).