Both the Munda Biddi Foundation and the DEC have announced the opening of the Sidings Rail Trail (dual use trail for cyclists and walkers) which runs between Jarrahwood and Nannup. As I understand it, the 26 km trail will form part of the second stage of the Munda Biddi Trail once the long awaited Collie to Nanup section opens.
The Sidings Rail Trail follows the old railway line built between Nannup and Wonnerup. In the early 1900s wood-fired steam trains using this line transported timber to and from the nearby Barrabup, Nannup and Jarrahwood mills and on to the coastal port of Busselton. (DEC, n.d.)
Maps of the Tail can be purchased from the Munda Biddi Trail Foundation for $4.95.
Update – May 23, 2008: RailTrails Australia has now posted on its website a description of the trail and a mud map of same.