Rocky Brook

{{Infobox river

| name = Rocky Brook

| image =

| image_alt =

| image_caption =

| map = Rocky Brook, New Jersey (map).jpg

| map_alt =

| map_caption = Map of Rocky Brook

| source1_location =

| source1_coordinates= {{coord|40|13|8|N|74|24|37|W}}

| mouth_location =

| mouth_coordinates = {{coord|40|17|18|N|74|32|23|W|display=inline,title}}

| subdivision_type1 = Country

| subdivision_name1 = United States

| progression = Millstone River, Raritan River, Atlantic Ocean

| length =

| source1_elevation =

| mouth_elevation = {{convert|79|ft|m|abbr=on}}

| discharge1_avg =

| basin_size =

| river_system = Raritan River system

| tributaries_left =

| tributaries_right = Timber Run

}}

Rocky Brook is a tributary of the Millstone River in Monmouth and Mercer counties, New Jersey, in the United States.Gertler, Edward. Garden State Canoeing, Seneca Press, 2002. {{ISBN|0-9605908-8-9}}

Course

File:Perrineville_Lake.jpg for Rocky Brook]]

Rocky Brook starts at {{coord|40|13|8|N|74|24|37|W}},{{cite web|title=GNIS Detail - Rocky Brook|url=http://gnis.usgs.gov/pls/gnispublic/f?p=139:3:2632076808412938::NO:3:P3_FID,P3_TITLE:879766%2CRocky%20Brook|publisher=USGS|accessdate=26 July 2010}} 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 {{coord|40|15|13|N|74|29|59|W}}.

File:2023-10-13 11 03 51 The pedestrian bridge over the spillway of Peddie Lake in Hightstown, Mercer County, New Jersey.jpg

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 {{coord|40|17|18|N|74|32|23|W}}.