In the main area of the park, in and along the banks of Buffalo Brook, one time known as "Gold Brook," gold was discovered. This was in 1855 and mining operations continued for some 30 years. The site of Camp Plymouth was at one time thought to have been used as an encampment by soldiers of the Revolutionary War in 1777, while en route from Rindge and Fort Number 4 (Charlestown, New Hampshire) to the Battle of Ticonderoga. It now seems that the encampment was about two miles north of Camp Plymouth.

The total acreage is 295 acres of which 46 acres comprise the developed portion of the park. The balance (249 acres) contains hiking trails, fishing, hunting, gold panning, and primitive camping, but is largely forestry oriented. There is a group camping area on the south side of Buffalo Brook consisting of 6 lean-tos, tent sites, pit toilets, and a large field for activities. On the north side of the brook there are a large picnic area, play area, sandy beach, horseshoe pits, concession, boat rentals, and rental cottages. There is a large enclosed picnic shelter including a kitchen for larger groups as well as two smaller open pavilion-style picnic shelters.

• Take advantage of the numerous hiking trails.