Stocked · New Jersey

Big Flat Brook (below Steam Mill Bridge)

Big Flat Brook (below Steam Mill Bridge) is a stocked trout stream in Sussex County, New Jersey, around Walpack Township. 19.7 of its 19.8 miles (99%) run through mapped public land. New Jersey allocated 28,510 trout to it for spring 2026.

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Public water
19.7 of 19.8 mi
Stocked, spring 2026
28,510 trout
Public parking
27 sites
1 streams
Legend & map details
StockedWild troutHoldoverNot public landPublic landPParkingLaunchRiver gauge, flow for the date: low below normal above high no reading

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Public access and parking

All 27 mapped parking areas and access points along the stream are on public land, from Delaware Water Gap National Recreation Area to Stokes State Forest. Distances are to the nearest bank.

  1. Delaware Water Gap National Recreation AreaParking · 23 m from the waterDirections
  2. Delaware Water Gap National Recreation AreaParking · 34 m from the waterDirections
  3. Walpack Wildlife Management AreaPulloff Parking · 35 m from the waterDirections
  4. Walpack Wildlife Management AreaUnpaved Parking · 126 m from the waterDirections
  5. Walpack Wildlife Management AreaUnpaved Parking · 134 m from the waterDirections
  6. Delaware Water Gap National Recreation AreaParking · 253 m from the waterDirections
  7. Delaware Water Gap National Recreation AreaParking · 275 m from the waterDirections
  8. Delaware Water Gap National Recreation AreaParking · 132 m from the waterDirections

Stocking

28,510 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.

Regulations

Catch and release area: Rt. 206 bridge downstream to the Roy Bridge on Mountain Rd. (4.2 miles), including the Blewett Tract. Digest p. 20

Other sections of this water have their own pages: Big Flat Brook (above Steam Mill Bridge).

Rules: 2026 New Jersey Freshwater Fishing Digest, pages 16-21.

Current flow and water temperature

The USGS gauge on this stream is Flat Brook near Flatbrookville, NJ. Its current reading appears here and on the state map.

Nearby

Other streams in Sussex County: Musconetcong River · Paulins Kill · Pequest River · Wallkill River · Little Flat Brook · Clove Brook · Lubbers Run · Franklin Pond 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.

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