Georgetown-Rowley State Forest 
Rte. 97
Georgetown, MA 01833
978-887-5931
http://www.mass.gov/eea/agencies/dcr/massparks/region-north/georgetown-rowley-state-forest.html
State Park: Bike, Birding, Hike, Horse, Picnic, Snow Sports, Walk
This 1,112 acre forest offers a variety of year-round activities including horseback riding, hiking, walking, hunting (some restrictions), cross-country skiing, and snowmobiling.