Manalapan Brook
Manalapan Brook is a tributary of the South River in Monmouth and Middlesex counties, New Jersey in the United States.
The Manalapan Brook's source is at 40°11′26″N 74°23′51″W / 40.19056°N 74.39750°W in Monmouth County, a few miles south of Monmouth Battlefield State Park, adjacent to the headwaters of Matchaponix Brook. It flows generally north, heading to Jamesburg. After crossing a dammed section named Lake Manalapan, it continues north along CR 615 (Main Street) then flowing into Devoe Lake in Spotswood. The flow then merges with Matchaponix Brook in Spotswood forming the South River. It crosses under Route 18 and continues to the Raritan River, where it ends at 40°23′33″N 74°22′58″W / 40.39250°N 74.38278°W.
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