Was the guys name JD by any chance? I did a ride a year ago with a guy called JD I think and he took us through bucket loads of single track between the river and carter road. Awesome stuff :-)
Same bit of forest - there's lots more out there apparently. Next time I'll have to gps-it so we get a feel for where it actually goes!
You young people and your GPS's. In my day we used to ride around not knowing or caring where we were going and then get lost and eventually get home sometime around midnight. Ahh those were the days. Actually those are still the days.