Meet at 10 a.m. Hike 3-5 Mi depending upon weather and trail conditions through rolling hills of white pine and red oak that are part of the Neponset and Charles River Watersheds. View rocky ledges and glacial erratics. Bring water, lunch, appropriate footwear. Dir: From I-95/128 take exit 16B, Rte 109 W for 5.7 Mi thru Westwood and into Medfield. Take right hairpin turn onto Hartford St in Medfield. Follow for 0.6 Mi to entrance and parking area on Left. Trustees of Reservations members free; nonmembers $4. (B3C)