Swimming, fishing, and hiking, as well as hiking at nearby Mount Monadnock, are favorite activities of campers at Greenfield State Park Campground. A separate 900-foot beach for campers only, canoe and kayak rentals, a camp store, a dump station, and showers are available.

The 257-site campground includes 200 sites available by reservation only; 5 for youth group reservations; and 52 sites for first-come/first-served campers. Although hook-ups are not available, RVs are welcome in sites where they fit.

Organized youth group camping is welcome in the park. Reservations are required.