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Rocky Brook facts for kids

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Rocky Brook
Rocky Brook, New Jersey (map).jpg
Map of Rocky Brook
Country United States
Physical characteristics
Main source 40°13′8″N 74°24′37″W / 40.21889°N 74.41028°W / 40.21889; -74.41028
River mouth 79 ft (24 m)
40°17′18″N 74°32′23″W / 40.28833°N 74.53972°W / 40.28833; -74.53972
Basin features
Progression Millstone River, Raritan River, Atlantic Ocean
River system Raritan River system

Rocky Brook is a tributary of the Millstone River in Monmouth and Mercer counties, New Jersey in the United States.


Perrineville Lake
Perrineville Lake, the headwaters for Rocky Brook

Rocky Brook starts at 40°13′8″N 74°24′37″W / 40.21889°N 74.41028°W / 40.21889; -74.41028, near Perrineville. It flows parallel to CR-1 (Sweetmans Lane) before draining into Perrineville Lake. It continues flowing west into the northern areas of Perrineville Lake Park. It then turns northwest and crosses Perrineville Road and flows through the Etra Road Open Space area. It crosses Disbrow Hill Road and drains into the Etra Lake at 40°15′13″N 74°29′59″W / 40.25361°N 74.49972°W / 40.25361; -74.49972.

Hightstown Waterfall (Rocky Brook)
Waterfall from Peddie Lake

It continues flowing west alongside Etra Road and crosses the New Jersey Turnpike. It then flows into Peddie Lake in the heart of Hightstown. It crosses Route 33 and flows past the Town Center Plaza and Shopping Center before crossing Route 130 and the Hightstown Bypass. It then flows alongside the East Windsor Open Space Acquisition before draining into the Millstone River at 40°17′18″N 74°32′23″W / 40.28833°N 74.53972°W / 40.28833; -74.53972.



There are numerous lakes that flow along the course of the brook. Notably, there is:

  • Peddie Lake in Hightstown (in which it receives its namesake from the nearby Peddie School).
Lake Etra
Lake Etra

Sister tributaries

Rocky Brook's sister tributaries include:

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