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Sullivan County

Mongaup River West Branch

NYSDEC reported 620 trout stocked in Mongaup River West Branch (Sullivan County) in 2025, the latest year in its stocking lists. The most recent month listed is April 2025. DEC lists stocking by month, not by day.

NYSDEC data pulled .

A stream with rocks
Photo: Christian_Birkholz, Pixabay License, Pixabay

Mongaup River West Branch in numbers

trout stocked in 2025
620
yearly average, 2020–2024
522
years stocked since 2020
6
Stocking log

Every stocking record

DEC stocking lists for the last three years on record, by month and species, newest first, then yearly totals. DEC lists each batch with its average length; where a month has several batches the range is shown.

Last stocked, April 2025620620 brown trout
2025 · 620 fish
MonthSpeciesFishBatchesAverage length
AprilBrown trout620 fish · Average length: 7.1–13.9 in62027.1–13.9 in
2024 · 590 fish
MonthSpeciesFishBatchesAverage length
AprilBrown trout590 fish · Average length: 8.2–13.4 in59028.2–13.4 in
2023 · 590 fish
MonthSpeciesFishBatchesAverage length
AprilBrown trout590 fish · Average length: 8.9–13.1 in59028.9–13.1 in
Every year since 2020
YearFish
2025620 fish620
2024590 fish590
2023590 fish590
2022590 fish590
2021590 fish590
2020250 fish250
2020 – 2025

Trout stocked each year

DEC’s lists end with the latest year it has published. The tallest year is yellow.

  1. 2502020: 250 fish
  2. 5902021: 590 fish
  3. 5902022: 590 fish
  4. 5902023: 590 fish
  5. 5902024: 590 fish
  6. 6202025: 620 fish

What is stocked here

All records since 2020
SpeciesFishShare
Brown trout3,230100%

No single map point is given for this water in the USGS names database, so no map is shown.

Also in Sullivan County: Willowemoc Creek, Beaver Kill, Callicoon Creek East Branch, Callicoon Creek North Branch, Neversink River, Ten Mile River, Neversink Reservoir, Beaver Brook.

Source: DEC fish stocking lists (actual), data.ny.gov and the DEC spring trout stocking plan, data.ny.gov, New York State Department of Environmental Conservation. Pulled . Check the agency and the current fishing rules before you go.