Little Flat Brook is a stocked trout stream in Sussex County, New Jersey, around Sandyston Township. 4.6 of its 13 miles (35%) run through mapped public land. New Jersey allocated 2,420 trout to it for spring 2026.
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
13 of the 15 mapped parking areas and access points along the stream are on public land, from Hainesville Wildlife Management Area to Flatbrook Roy Wildlife Management Area. Distances are to the nearest bank; the others sit on private or restricted land, so check posted signs before parking there.
2,420 trout stocked spring 2026. In-season stocking dates are on the state's schedule. Source: NJDEP Fish & Wildlife, 2026 Spring Trout Allocations, checked Oct 12, 2026.
The 2026 Digest lists no special regulation for this stream, so the statewide trout rules apply: season dates, daily limits and minimum sizes.
Rules: 2026 New Jersey Freshwater Fishing Digest, pages 16-21.
The nearest USGS gauge is on another water, 12.8 km away: Flat Brook near Flatbrookville, NJ. Its reading is a hint for the area, not this stream's own flow.
Other streams in Sussex County: Musconetcong River · Paulins Kill · Big Flat Brook (below Steam Mill Bridge) · Pequest River · Wallkill River · Clove Brook · Lubbers Run · Big Flat Brook (above Steam Mill Bridge)
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 Access, stocking and rules come from New Jersey's own data and can be out of date.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.