Nothing live is published for this water, so there is no reading or verdict today. The readings section below says what we checked.
The South Branch Grass River is a freestone river in New York, listed as Catch and release by New York State Department of Environmental Conservation (NYSDEC), Bureau of Fisheries.
1 shop nearby are listed here.
South Branch Grass River is a freestone river in New York.
No real-time gauge on this water. We found no active USGS gauge on South Branch Grass River 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 South Branch Grass River
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 South Branch Grass River: gauges, shops and guides
Map of South Branch Grass River, and shops and guides with an exact address within 40 miles.
Restrooms within 2 miles of South Branch Grass River 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.
No restroom mapped within 2 mi yet — add one you know.
Campgrounds, fishing access sites and boat ramps often have one that isn't on the map yet.
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 releaseFlume Falls on the West Branch Ausable River, Wilmington, New York. Photo: James St. John, CC BY 2.0, via Wikimedia Commons
New York · about 48 mi
Steelhead / salmon waterRepresentative photo · not Black RiverAnglers on the lower Salmon River near Port Ontario, New York, in October. Photo: Bill Blevins, CC BY 2.0, via Wikimedia Commons Not Black River.
Special-regulation trout waterRepresentative photo · not Chateaugay RiverThe Mettawee River near Whitehall, New York, from a canoe. Photo: MJPlante1, CC BY-SA 4.0, via Wikimedia Commons Not Chateaugay River.
New York · about 58 mi
Wild Trout WaterRepresentative photo · not True BrookThe Battenkill in Arlington, Vermont. Photo: Gplefka, public domain, via Wikimedia Commons Not True Brook.
New York · about 58 mi
Steelhead / salmon waterRepresentative photo · not Mill CreekOatka Creek at Le Roy, New York, looking north from the Main Street bridge. Photo: Andre Carrotflower, CC BY-SA 4.0, via Wikimedia Commons Not Mill Creek.
Catch and releaseRepresentative photo · not West Canada CreekThe East Branch Delaware River at its confluence with the Beaverkill, East Branch, New York. Photo: Daniel Case, CC BY-SA 4.0, via Wikimedia Commons Not West Canada Creek.
New York · about 63 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.
On the Catch and release trout stream reaches (all year, artificial lures only) list (New York State Department of Environmental Conservation (NYSDEC), Bureau of Fisheries, 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 2026-11-04) 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.
33.3 of 42.5 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.
No guide within 40 miles yet.
The hatch and season chart for this water's region.
8 hatches charted for the region, not measured on this water. From Pennsylvania Fish & Boat Commission.
Blue Quill (April) · Hendrickson (April) · Quill Gordon (April) · Green drake (May) · Mayflies (best hatches) (May) · Mayflies, stoneflies and caddisflies (June to September) · and 2 more on the chart
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 South Branch Grass River.
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 “South Branch Grass River”, halfway along its length in New York, 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 releaseFlume Falls on the West Branch Ausable River, Wilmington, New York. Photo: James St. John, CC BY 2.0, via Wikimedia Commons
New York · about 48 mi
Steelhead / salmon waterRepresentative photo · not Black RiverAnglers on the lower Salmon River near Port Ontario, New York, in October. Photo: Bill Blevins, CC BY 2.0, via Wikimedia Commons Not Black River.
New York · about 57 mi
Rainbow trout, brown trout & steelhead
257cfsFlow now · below normal for the date
Special-regulation trout waterRepresentative photo · not Chateaugay RiverThe Mettawee River near Whitehall, New York, from a canoe. Photo: MJPlante1, CC BY-SA 4.0, via Wikimedia Commons Not Chateaugay River.
New York · about 58 mi
Wild Trout WaterRepresentative photo · not True BrookThe Battenkill in Arlington, Vermont. Photo: Gplefka, public domain, via Wikimedia Commons Not True Brook.
New York · about 58 mi
Steelhead / salmon waterRepresentative photo · not Mill CreekOatka Creek at Le Roy, New York, looking north from the Main Street bridge. Photo: Andre Carrotflower, CC BY-SA 4.0, via Wikimedia Commons Not Mill Creek.
Catch and releaseRepresentative photo · not West Canada CreekThe East Branch Delaware River at its confluence with the Beaverkill, East Branch, New York. Photo: Daniel Case, CC BY-SA 4.0, via Wikimedia Commons Not West Canada Creek.
