Just dug through this thread, no one mentioned Dracut State Forest down at the Althea rd side there is some pretty awesome stuff. 4 Pretty good runs, couple decent jumps, big berms and a couple drops.
Just up the Street in pelham there is some pretty fun runs stashed away in Cutter Woods.
Took a walk through Robin Hill in Chelmsford Ma. Anyone still working out there?
I've started work in Haverhill on one trial. Just by myself right now. Still very rough outline. Also check out Kenoza state forest in Haverhill and Hunley Hills conservation area in Rowley.