Yeah I'm fairly sure I know the trail you mean. If I ride up from possums to brokers i'll ride down there to get quickly back to treetops/possums. It's got a really hidden entrance and it's basically about 100m straight and _steep_ then a kinda switchback in the middle then another 100m or so straight and steep...then a switch back out. Drops you out onto the fire-road then a few hills back up to tree tops? Pretty sick track but it's mega sketchy on the XC bike haha
Tree tops is actually a quick loop if you have a bike that can pedal up hills, the two steep climbs are fair killer though after a few goes.
Looks like this?
Edit: sorry will stop filling the thread up with OT shite :|