[1] It runs through the industrialized section between Harts Lane and Route 18.

Another branch from the south joins it, and it crosses Tices Lane.

It crosses the New Jersey Turnpike and Ryders Lane, and drains into Westons Mill Pond, a dammed section of Lawrence Brook, at 40°27′34″N 74°25′53″W / 40.45944°N 74.43139°W / 40.45944; -74.43139.

Sawmill Brook runs through heavily populated areas, so it is easy to access.

This article related to a river in New Jersey is a stub.