Jamaica State Park, now comprising 772 acres, was completed and opened to the public in 1969.
Previously, the area had supported a few small farms and a sawmill. The West River Railroad ran through the park. The old railroad bed is now used as the trail that leads along the West River to Ball Mountain Dam. The railroad operated from about 1879 until 1927, when a flood wiped most of it out.
The area at Salmon Hole, now used as the swimming area, was the site of a famous Indian Massacre in 1748.
Jamaica State Park is located on a bend of the West River about one-half mile from the center of the town of Jamaica. Nearby to the north is Ball Mountain. Hamilton Falls is located about one mile up Cobb Brook, which enters the West River upstream from the park. The West River has a very large drainage area extending from Weston and the south side of Terrible Mountain to Windham on the east and Bromley on the west.
Every fall, on one weekend in September, there is a water release on the West River from Ball Mountain Dam that draws whitewater paddlers to the park.
The West River is also a favorite spot for many fishermen. The combination of deep slow running water and shallow fast ripples makes for some fine fishing.
There are 41 tent/trailer sites and 18 lean-to sites that are spread out through the campground. Two rest rooms, complete with hot showers ($), are located in the campground. A picnic shelter and nature center are located near the picnic area and swimming hole. A hiking trail follows the West River and branches off toward Hamilton Falls.