How many preserves & forests are in Erving, MA?
3 preserves & forests in Erving, MA are listed here: Erving State Forest, Jack's Brook Forest, Poplar Mountain Conservation Area. Each page has parking, entry fees, and hours where they are confirmed, and says so where they are not.
Which preserves & forests in Erving, MA are free to enter?
Poplar Mountain Conservation Area. Free entry is confirmed for this one; the others either charge or have no confirmed fee on record.