Nothing live is published for this water, so there is no reading or verdict today. The readings section below says what we checked.
Big Flat Brook is a freestone river in New Jersey, listed as Catch and release by New Jersey Department of Environmental Protection, Fish & Wildlife (official eRegulations edition of the Freshwater Fishing Digest).
1 guide and 2 shops nearby are listed here.
Big Flat Brook is a freestone river in New Jersey.
No real-time gauge on this water. We found no active USGS gauge on Big Flat Brook or on its stream system within about 25 miles, and no dam operator publishes data for it. A missing gauge says nothing about the water itself. Find the gauges nearest Big Flat Brook
Start from the agency's public access map. Nothing on this page grants or implies access: check the agency map, posted signs and landowner permission before you fish.
Nothing on this page grants or implies access.
Shops and guides within 40 miles
Map of Big Flat Brook: gauges, shops and guides
Map of Big Flat Brook, and shops and guides with an exact address within 40 miles.
Restrooms within 2 miles of Big Flat Brook in a straight line, nearest first, with what anglers found when they went. The map says a restroom is there, not whether it is clean or open today.
Map of 4 restrooms near Big Flat Brook
Skip the map; every place is in the list belowMap of 4 restrooms near Big Flat Brook, numbered as in the list, with the water’s point marked.
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Not rated yet — be the first to tell other anglers if it's clean.
Mapped on OpenStreetMap · see or fix it on the map
Restroom locations and map details: © OpenStreetMap contributors, Open Database License, read Oct 24, 2026. Ratings, answers and photos are members' own; who shared them is never shown, and every photo is reviewed before it appears. Visits older than 18 months no longer count. Distances are straight-line miles, not driving. Nothing here grants access to private land. Community guidelines.
Catch and releaseRepresentative photo · not Flat BrookThe South Branch Raritan River at the Columbia Trail after rain, New Jersey. Photo: Magpieturtle, CC BY 4.0, via Wikimedia Commons Not Flat Brook.
New Jersey · about 15 mi
Special-regulation trout waterRepresentative photo · not Lake WawayandaMooselookmeguntic Lake from Oquossoc, Maine. Photo: Doug Kerr, CC BY-SA 2.0, via Wikimedia Commons Not Lake Wawayanda.
New Jersey · about 16 mi
Wild Trout WaterRepresentative photo · not Van Campens BrookThe Neversink River at Oakland Valley, New York. Photo: Daniel Case, CC BY-SA 4.0, cropped, via Wikimedia Commons Not Van Campens Brook.
New Jersey · about 17 mi
Special-regulation trout waterRepresentative photo · not Clinton ReservoirRangeley Lake, Maine. Photo: Manuel Velazquez, CC BY 3.0, via Wikimedia Commons Not Clinton Reservoir.
New Jersey · about 18 mi
Special-regulation trout waterRepresentative photo · not White LakeSunrise over Lake Marion from Santee State Park, South Carolina. Photo: Andrew Parlette from Elkridge,MD, US, CC BY 2.0, via Wikimedia Commons Not White Lake.
New Jersey · about 19 mi
Wild Trout WaterRepresentative photo · not Pequannock RiverWillowemoc Creek east of Livingston Manor, New York. Photo: Donald B. Siano, public domain, via Wikimedia Commons Not Pequannock River.
New Jersey · about 23 mi
Seasons, limits, special regulations and closures for each reach are on the agency pages below. Read them before you go.
Each comes from the agency's own published list; where the list names a reach it is quoted. A designation applies to the listed reach, not necessarily the whole water. Listed in the finder under trout.
On the Catch and Release Areas (year-round, artificial lures and flies, barbless) list (New Jersey Department of Environmental Protection, Fish & Wildlife (official eRegulations edition of the Freshwater Fishing Digest), read 2026-10-20). All waters with this designation
On the Catch and Release Areas (year-round, artificial lures and flies, barbless) list (New Jersey Department of Environmental Protection, Fish & Wildlife (official eRegulations edition of the Freshwater Fishing Digest), read 2026-10-20). All waters with this designation
Measured from the NHDPlus High Resolution (flowlines and waterbodies) (U.S. Geological Survey, read 2026-11-04) for this water’s own mapped feature. Rounded figures; they describe the channel, not today’s conditions.
Areas the Protected Areas Database of the United States (PAD-US), public access (U.S. Geological Survey, Gap Analysis Project, read 2026-11-05) lists as owned or held in easement and open to the public, crossed by the mapped channel. Boundaries are mapped, not surveyed. Nothing on this page grants or implies access: check the agency map, posted signs and landowner permission before you fish.
14.6 of 15.2 mi on public land
Nothing on this page grants or implies access.
Listings marked Unclaimed are built from open map records and the business's own website: confirm licensing, rates, dates and hours directly.
Califon, NJ · 36 mi
Fly shop · Guided trips · Fly tying classes
What 1 nearby guide website mention: what guides advertise, not a survey or a promise of what you will catch.
Named on 1 nearby guide website
None of our destination hubs is within 40 miles in a straight line. The trip planner builds a trip around the water itself: the guides and shops listed within 40 miles of it, its gauges and its nearest towns and airports.
No hub within 40 miles
A practical checklist for fly fishing small mountain trout streams: a short 3–4 weight rod, light line, a few buoyant dries and simple wet-wading gear, with estimated prices and where to buy.
7′6″–8′6″ rod, 3–4 weight, floating line · Brook, cutthroat, rainbow and brown trout
Open the checklistSeams, shelves and soft water, shown on real rivers.
Public YouTube videos from established channels, chosen by us to support this page. Not sponsored; the creators are not affiliated with Legendary Fly Gear.
Not sponsored All videos on reading water
Indicator rigs, depth and detecting the take.
Public YouTube videos from established channels, chosen by us to support this page. Not sponsored; the creators are not affiliated with Legendary Fly Gear.
Not sponsored All videos on nymphing
Trip stories anglers chose to share publicly and tagged with Big Flat Brook.
No stories from here yet.
Not a statement of access, fish presence or conditions.
A water page organises discovery. It does not assert public access, legal access, current fish presence, guide availability or fishing conditions.
Flows, gauge statistics and flood stages come from USGS and the National Weather Service when the page is shown. Regulations, stocking, species and season statements link to the agency that publishes them; this page copies only the species names and the quoted sentences. Guide and shop listings come from the Legendary directories. Position: a point on the mapped channel of “Big Flat Brook”, halfway along its length in New Jersey, from the USGS high-resolution hydrography (NHDPlus HR), read 4 Nov 2026. It marks the water, not a particular access or reach. Water type is our own classification.
Catch and releaseRepresentative photo · not Flat BrookThe South Branch Raritan River at the Columbia Trail after rain, New Jersey. Photo: Magpieturtle, CC BY 4.0, via Wikimedia Commons Not Flat Brook.
Special-regulation trout waterRepresentative photo · not Lake WawayandaMooselookmeguntic Lake from Oquossoc, Maine. Photo: Doug Kerr, CC BY-SA 2.0, via Wikimedia Commons Not Lake Wawayanda.
New Jersey · about 16 mi
Wild Trout WaterRepresentative photo · not Van Campens BrookThe Neversink River at Oakland Valley, New York. Photo: Daniel Case, CC BY-SA 4.0, cropped, via Wikimedia Commons Not Van Campens Brook.
New Jersey · about 17 mi
Special-regulation trout waterRepresentative photo · not Clinton ReservoirRangeley Lake, Maine. Photo: Manuel Velazquez, CC BY 3.0, via Wikimedia Commons Not Clinton Reservoir.
New Jersey · about 18 mi
Special-regulation trout waterRepresentative photo · not White LakeSunrise over Lake Marion from Santee State Park, South Carolina. Photo: Andrew Parlette from Elkridge,MD, US, CC BY 2.0, via Wikimedia Commons Not White Lake.
New Jersey · about 19 mi
Wild Trout WaterRepresentative photo · not Pequannock RiverWillowemoc Creek east of Livingston Manor, New York. Photo: Donald B. Siano, public domain, via Wikimedia Commons Not Pequannock River.
