From their site:
The Munda Biddi Trail (which means path through the forest in the Nyoongar Aboriginal language) is fast becoming a world-class, nature-based, off-road cycling experience.
Starting in Mundaring the Trail meanders through scenic river valleys and the magnificent eucalypt forests of the State’s South West. It utilises a network of bush tracks, firebreaks and disused railway formations and has sections suitable for cyclists of all ages and experience levels. Situated a comfortable day’s ride apart are purpose-built Munda Biddi campsites with roomy camp huts and tent sites.