Mongaup River
NYSDEC reported 880 trout stocked in Mongaup River (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 .
Mongaup River in numbers
- trout stocked in 2025
- 880
- yearly average, 2020–2024
- 790
- years stocked since 2020
- 6
Every stocking record
DEC stocking lists for the last three years on record, by month and species, newest first, then yearly totals, and the spring plan DEC published for this water. DEC lists each batch with its average length; where a month has several batches the range is shown.
| When (DEC wording) | Species | Fish | Size |
|---|---|---|---|
| April - first week 2026 | Brown trout620 fish | 620 | 9– 10 inches |
| April - first week 2026 | Brown trout70 fish | 70 | 12–15 inches |
| Month | Species | Fish | Batches | Average length |
|---|---|---|---|---|
| April | Brown trout880 fish · Average length: 7.1–13.9 in | 880 | 2 | 7.1–13.9 in |
| Month | Species | Fish | Batches | Average length |
|---|---|---|---|---|
| April | Brown trout840 fish · Average length: 11.2–13.4 in | 840 | 2 | 11.2–13.4 in |
| Month | Species | Fish | Batches | Average length |
|---|---|---|---|---|
| April | Brown trout830 fish · Average length: 8.9–13.1 in | 830 | 2 | 8.9–13.1 in |
| Year | Fish |
|---|---|
| 2025880 fish | 880 |
| 2024840 fish | 840 |
| 2023830 fish | 830 |
| 2022830 fish | 830 |
| 2021830 fish | 830 |
| 2020620 fish | 620 |
Trout stocked each year
DEC’s lists end with the latest year it has published. The tallest year is yellow.
What is stocked here
| Species | Fish | Share |
|---|---|---|
| Brown trout | 4,830 | 100% |
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.