River · Sullivan, New York
Mongaup River
At a glance
Who lives here
- Brown trout Salmo truttaStocked · 2025 · Fish stocking: New York State Department of Environmental Conservation, Fish Stocking Lists (data.ny.gov)
Not listed doesn't mean no fish.
Stocking
| Year | Species | Stage | Number |
|---|---|---|---|
| 2025 | Brown Trout | 790 | |
| 2025 | Brown Trout | 90 | |
| 2024 | Brown Trout | 90 | |
| 2024 | Brown Trout | 750 | |
| 2023 | Brown Trout | 80 | |
| 2023 | Brown Trout | 750 | |
| 2022 | Brown Trout | 80 | |
| 2022 | Brown Trout | 750 | |
| 2021 | Brown Trout | 80 | |
| 2021 | Brown Trout | 750 | |
| 2020 | Brown Trout | 550 | |
| 2020 | Brown Trout | 70 | |
| 2019 | Brown Trout | 70 | |
| 2019 | Brown Trout | 660 | |
| 2018 | Brown Trout | 70 | |
| 2018 | Brown Trout | 650 | |
| 2017 | Brown Trout | 620 | |
| 2017 | Brown Trout | 70 | |
| 2016 | Brown Trout | 650 | |
| 2016 | Brown Trout | 70 |
As the agency publishes it. Newest first: 20 of 20.
Getting on the water
- Rio ReservoirBoat launch · New York State Department of Environmental Conservation and WISP programs
Listed by public agencies. A listed site doesn't make the water or its shore open to fishing: when in doubt, it's unknown. Check signs and local rules.
The rules
Summary, not the law. Check the official regulations before you fish.
HuntGrid has no rules for this water yet.
Official regulations: New York State DEC
What's biting
Not enough anglers have shared catches here lately. A species shows for a week once at least 5 anglers share catches of it.
From anglers who chose to share their catches in HuntGrid Fishing, each counted once, counts rounded to the nearest 5, published 3 days after the week ends and never changed. Never a spot, time or name.
About this page
Sources and licences:
- U.S. Geological Survey, National Hydrography Dataset Plus High Resolution (NHDPlus HR); U.S. Census Bureau, TIGER/Line® Shapefiles 2025: counties and states · Public domain (U.S. Government work, 17 U.S.C. §105)
- Fish stocking: New York State Department of Environmental Conservation, Fish Stocking Lists (data.ny.gov) · OPEN-NY Terms of Use (https://data.ny.gov/dataset/OPEN-NY-Terms-Of-Use/77gx-ii52, read 2026-10-19): no attribution required; "You agree to defend, indemnify and hold harmless the State", accepted under the owner's 2026-10-19 rule. data.ny.gov dataset e52k-ymww (Fish Stocking Lists (Actual): Beginning 2011, read 2026-10-19) states no other licence. Credit the agency; remove the layer if the agency asks.
- New York State Department of Environmental Conservation and WISP programs · No restrictions on use (NYS DEC, the item's terms of use: "No restrictions")
The outline is drawn from the official water data credited above, without a basemap. These pages show no angler's catches, spots or tracks.