Cruser Brook, also known as Crusers Brook, is a tributary of Pike Run in Somerset County, New Jersey in the United States.

Cruser Brook starts at 40°26′47″N 74°42′17″W / 40.44639°N 74.70472°W / 40.44639; -74.70472 in Sourland Mountain. It flows northeast and picks up Roaring Brook. It crosses CR-601 (Belle Mead-Blawenburg Road) and continues flowing east. It crosses Route 206 and drains into Pike Run at 40°27′20″N 74°39′4″W / 40.45556°N 74.65111°W / 40.45556; -74.65111.

• Roaring Brook

• Back Brook
• Pine Tree Run

• List of rivers of New Jersey

• USGS Coordinates in Google Maps