Celebrate National Trails Day at Lynn Woods with Friends of the Lynn Wood and ECGA. Lynn Woods Reservation is the second largest municipal park in the greater Boston area. This 2,200 acre forest reserve consists of ponds, wetlands, streams, deciduous & evergreen forest and rocky ledge. The ponds provide the drinking water for the residents of Lynn and surrounding communities. Wildlife abounds in the forest. More than an aquifer, wildlife preserve, wilderness experience, Lynn Woods is a unique adventure.