Its western boundary is defined by Fenn Creek, which begins as a stream rising near Hanningfield Reservoir and is tidal below the point where it is crossed by the A132 road. There are footpaths along both river banks at this location, with Marsh Farm Country Park situated between South Woodham Ferrers and the river. On the south bank is the hamlet of Brandy Hole, and the river flows through stretches called Brandy Hole and Brandy Hole Reach.
The western boundary is defined by Fenn Creek, which originates near Hanningfield Reservoir and becomes tidal at the point where it crosses the A132 road. Footpaths are present along both banks of the river at this location, with Marsh Farm Country Park situated between South Woodham Ferrers and the river. Brandy Hole, a hamlet, is located on the south bank, while the river flows through stretches called Brandy Hole and Brandy Hole Reach.