Lucas heights

Some good technical XC loops that follow along side of a creek.
XC loops range from 10ks to maybe 25ks

Also a few short free ride trails (but no shuttle access, so your pushing it back to the top)

Park oposite the nuclear reactor entrance on New Illawarra Rd,
The main trails start just down the gravel embankment on the western side of the road,

Watch out for dirtbikes, they wont give way...