How many preserves & forests are in Ayer, MA?
4 preserves & forests in Ayer, MA are listed here: Oxbow National Wildlife Refuge, Pine Meadow Conservation Area, Shepley's Hill, Shirley-Groton Road 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 Ayer, MA are free to enter?
Oxbow National Wildlife Refuge, Pine Meadow Conservation Area. Free entry is confirmed for these; the others either charge or have no confirmed fee on record.