Willoughby Brook is wild trout water on the state's list in Hunterdon County, New Jersey, around Lebanon Township. 1.6 of its 4 miles (40%) run through mapped public land.
Bold where the stream crosses public land; faint and dashed across private land. Gauges are measurement stations; a nearby gauge may be on a different stream.
Stream types · New Jersey
Bold where the stream crosses public land
All 11 mapped parking areas and access points along the stream are on public land, from Voorhees State Park to Voorhees State Park. Distances are to the nearest bank.
Not on the 2026 stocking list: the state lists it for its wild trout. Source: NJDEP Fish & Wildlife, 2026 Spring Trout Allocations, checked Oct 12, 2026.
Wild trout stream: Also known as Buffalo Hollow Brook, Lebanon Twp.. Digest p. 20
Rules: 2026 New Jersey Freshwater Fishing Digest, pages 16-21.
The nearest USGS gauge is on another water, 2.4 km away: South Branch Raritan River near High Bridge, NJ. Its reading is a hint for the area, not this stream's own flow.
Other streams in Hunterdon County: Musconetcong River · Raritan River S/B · D&R Feeder Canal · Black River · Spruce Run Creek · Stony Brook · Raritan River S/B TCA Gorge · Capoolong Creek
Check before you fish. Access, stocking and rules come from New Jersey's own data and can be out of date. Posted signs and landowners' wishes come first, and private land needs permission. You need a valid fishing license.