Pequannock River

It rises in eastern Sussex County, near Highland Lakes on the north side of Hamburg Mountain.

It flows southeast to Stockholm, then east-southeast, in a gap north of Green Pond Mountain and other ridges, past Butler and Bloomingdale.

It is a popular spot for recreation trout fishing in its upper reaches.

The Pequannock watershed is the source of most of Newark's water supply.

The lands and water were purchased under the mayoralty of Joseph E. Haynes.