Hopkinton Reservoir holds court amid the more than 1,400 acres of this easily accessible state park. The grounds are open year-round to various recreational activities, notably featuring ten miles of marked trails that can be shared by hikers, joggers, cyclists and even horseback riders. If there's enough snow (four inches), then bring along the snowmobile. Picnic areas, beaches and seasonal boat rentals, offered by Outdoor Recreation of Hopkinton (508-435-3965), are a few more options when visiting these sprawling grounds just minutes from the center of town.