Forest Lake State Park is a 397-acre public park in Dalton, New Hampshire, on the shore of Forest Lake. Open year-round and free to use, it centers on a 200-foot sandy beach and a simple lakeside setting designed for outdoor recreation. In warmer months, visitors use the park for swimming and picnicking, while the lake and surrounding parkland also provide access for mountain biking, fishing, and boating. Its significance lies in offering straightforward public access to the water and a compact range of outdoor activities in a small state park setting.