We started from the main parking lot which you can find at the end of Cunningham Avenue at Landsborough. The start of the Tunnel Track is right next to it, so we walked the 15 minutes or so to reach the heritage tunnel that is probably the park's most interesting feature.
Built in 1891, it was originally a rail tunnel but the railway line is long gone. It's relatively short and we didn't see the bat colony that apparently roosts there seasonally (we walked in September), but it was still interesting.
The rest of the walk was on tracks that looked like fire trails, which walkers share with mountain-bike riders and the occasional horse-rider. The tracks were well-formed clay and gravel surfaces that were easy to walk on, if not that pretty.