Hartstuff Park is a town park with a playground, a 9-hole disc golf course, and at least a mile of nature trails, plus a swimming pond and athletic fields. The park is managed by the Rockland Youth Commission. The relatively new (2020) playground is a popular feature here, as is the 9-hole disc course.

There is a small swimming pond, with a sandy beach, for use by Rockland residents only. In season, it has lifeguards on duty Monday through Friday, 11 am to 5 pm. Also, weekends are 12-5 pm, but only during extreme hot spells.

The Hartsuff Park Nature Trail extends through much of the property. Between that and the additional trails of the disc golf course, there is at least a mile altogether, mostly through the woods. It is mostly flat and wide, with the occasional small hill. Some sections are rocky. The trail also features a large wooden footbridge, which extends over a sometimes-dry stream bed.

This park is bordered on all sides by woodlands, primarily oak, and beech, with some pine and yellow birch. The land drains to Cushing Brook, a tributary to the Drinkwater River, which leads to the Indian Head River and ultimately to the North River system.