St. Lawrence County · stream · order 5 river · ~239 cfs typical
South Branch Grass River
Stocked 10× since 2024 · NYSDEC
South Branch Grass River is a stream in St. Lawrence County, New York, stocked with Brown Trout — most recently on May 11, 2026. FishableWaters aggregates every stocking record for this water from NYSDEC; the latest schedule and today's bite windows are above.
Best days this week
Days near a new or full moon tend to fish best.
Today's bite windows
Conditions, next 3 days
Today
Fog
77°
63°
8 mph
32%
Fri
Partly cloudy
81°
60°
6 mph
1%
Sat
Rain
84°
65°
6 mph
9%
↗ pressure risingPost-front rising pressure can slow things down for a day.
Stocking ledger
| — 2026 — | ||||
| May 11 | Brown Trout | 270 | 12" | |
| May 11 | Brown Trout | 2,260 | 9" | |
| — 2025 — | ||||
| May 1 | Brown Trout | 170 | 13.3" | |
| May 1 | Brown Trout | 1,540 | 8.3" | |
| May 1 | Brown Trout | 80 | 13.3" | |
| May 1 | Brown Trout | 690 | 8.3" | |
| — 2024 — | ||||
| May 1 | Brown Trout | 660 | 9.3" | |
| May 1 | Brown Trout | 80 | 13.2" | |
| May 1 | Brown Trout | 170 | 13.2" | |
| May 1 | Brown Trout | 1,470 | 9.3" | |
When does South Branch Grass River get stocked?
Going by 10 records since 2024, stocking here peaks in May.
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Middle Branch Grass River0.0 mi
- Colton Creek0.5 mi
- Boyd Pond1.4 mi
- Mud Pond2.4 mi
- Horseshoe Pond2.8 mi
- Alder Brook2.6 mi
- North Branch Grass River3.5 mi
- Buck Brook3.8 mi
Seasons, limits, and rules are the state's call — check the official NY regulations and buy your license before you go. We link the source; we never restate the rules.
South Branch Grass River fishing — FAQ
What fish are stocked in South Branch Grass River?+
South Branch Grass River is stocked with Brown Trout in St. Lawrence County, New York, most recently on May 11, 2026 by NYSDEC. The full stocking ledger is on this page.
When does South Branch Grass River get stocked?+
Going by 10 records since 2024, stocking at South Branch Grass River peaks in May. Check this page for the season's scheduled and most recent stockings.
Do I need a license to fish South Branch Grass River?+
Yes — New York requires a fishing license. Buy one from the state and check current seasons and limits before you go; both are linked on this page.
Where is South Branch Grass River?+
South Branch Grass River is a stream in St. Lawrence County, New York. Driving directions and an interactive topo map are on this page.
Data: NYSDEC · updated May 11, 2026 · checked daily · we publish what agencies publish, nothing else.