Surrounded by the rolling hills of Hunterdon County, Spruce Run Recreation Area
is popular with picnickers, swimmers, fishermen, boaters and campers. The reservoir was one of the first water supply facilities to be constructed and operated by the state and covers 1,290 acres with 15 miles of shoreline for recreation. There are many waterfront (and close to waterfront) campsites available, as well as a boat rental area. Spruce Run is the third largest reservoir in the state after the Round Valley
and Wanaque reservoirs.