One tree hill is okay, quite a few tracks through there, the south side is quite steep and hilly.
Spring gully near the reservoir is good, go in opposite One Tree Hill pub, head up past the dam, single trail up to the res, then turn left, 500 metres turn right onto single trail, this goes out to Diamond Hill rd can go across the rd out to Mt Herbert.
Welshford Forrest has some good flat but dusty single trails and plenty of fire roads.
Wed night at 7.00 a group leaves from the Chicken shop at Strath Hill, need lights, or in summer just ride for the first 1hr or so, good way to learn where tracks are.
We ride on a different track most Wed nights.