Rocky Brook

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

Course

Rocky Brook starts at, near Perrineville. It flows parallel to CR-1 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.
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.

Tributaries

Timber Run
Lakes

There are several lakes that flow along the course of the brook. These include:

Perrineville Lake in Millstone
Etra Lake in East Windsor
Peddie Lake in Hightstown
Sister tributaries

Rocky Brook's sister tributaries include:

Beden Brook
Bear Brook
Cranbury Brook
Devils Brook
*Shallow Brook
Harrys Brook
Heathcote Brook
Indian Run Brook
Little Bear Brook
Millstone Brook
Peace Brook
Royce Brook
Simonson Brook
Six Mile Run
Stony Brook
Ten Mile Run
Van Horn Brook