When was Mongaup Falls Reservoir last stocked?

The latest reported stocking was Apr 1 to 30, 2025 (brown trout, 1,340 fish), according to New York agency reports.

How often is Mongaup Falls Reservoir stocked?

Across all years on record, most stockings come in April.

What kind of trout are stocked in Mongaup Falls Reservoir?

Brown trout (3 stockings, 3,980 fish).

How warm is the water near Mongaup Falls Reservoir?

The USGS gage read 66°F on Sep 25. Getting warm for trout. Fish early in the morning and land fish quickly.

Mongaup Falls Reservoir trout stocking

Lumberland, Sullivan County, New York · lake

Mongaup Falls Reservoir was last stocked 18 months ago (Apr 1 to 30, 2025). We have 4 stockings on record since Apr 1, 2023. Most stockings come in April. Species stocked: brown trout.

Last stocked

18 months ago

Apr 1 to 30, 2025

Next planned

Not announced

Last 12 months

0 stockings

Water temperature

66°F

Warm for trout

River conditions

USGS gage: MONGAUP R BELOW SWINGING BRIDGE RESERVOIR NY (2 km away).

Water temperature: 66°F
Flow: 58 cfs; much lower than usual for the last six weeks
Gage height: 3.78 ft

Warm for trout. Getting warm for trout. Fish early in the morning and land fish quickly.

Water temperature (daily high), last six weeks (°F), daily. Latest: 66 °F on Sep 24. The green band is the ideal range for trout.

Streamflow, last six weeks (cfs), daily. Latest: 59 cfs on Sep 23.

Latest reading Sep 25, 2026, 3:15 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Mongaup Falls Reservoir

Overnight
43°F
Patchy Fog
wind 5 mph
Friday
69°F
Patchy Fog then Partly Sunny
wind 5 to 10 mph
Friday Night
49°F
Mostly Cloudy
3% rain · wind 7 to 10 mph
Saturday
65°F
Light Rain Likely
59% rain · wind 13 mph
Saturday Night
50°F
Light Rain Likely
61% rain · wind 9 to 13 mph
Sunday
64°F
Light Rain Likely
61% rain · wind 12 mph

Forecast from the National Weather Service for this location, refreshed hourly.

When is Mongaup Falls Reservoir stocked?

Most stockings come in April.

By month, all years

Stockings of Mongaup Falls Reservoir by month, all years on record. This month is shown in blue.

Year by year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2026				1
2025				1
2024				1
2023				1

What is stocked

Species	Stockings	Fish	Fish per stocking	Typical size
Brown trout	3	3,980	1,327	8.2 in

Stocking history

Date	Species	Fish
Apr 15 to 21, 2026planned	Brown trout	1,350
Apr 1 to 30, 2025	Brown trout	1,340
Apr 1 to 30, 2024	Brown trout	1,360
Apr 1 to 30, 2023	Brown trout	1,280

From New York fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.

Where is Mongaup Falls Reservoir?

Lumberland, Sullivan County, New York. Approximate: the marker is the USGS place-name point for this water, not an agency location.

Directions Larger map

Stocked waters near Mongaup Falls Reservoir

Halfway Brookstream · 6 mistocked Apr 1, 2025
Beaver Brookstream · 8 mistocked Apr 1, 2025
Shingle Killstream · 8 mistocked Mar 1, 2024
Neversink Riverstream · 9 mistocked Jun 1, 2025
Mongaup Riverstream · 11 mistocked Apr 1, 2025
Rutgers Creekstream · 15 mistocked Mar 1, 2025
Loch Sheldrake17 mistocked Apr 1, 2025
Callicoon Creekstream · 20 mistocked Apr 1, 2025

All stocked waters in Sullivan County Stocked this week in New York

Questions about Mongaup Falls Reservoir

When was Mongaup Falls Reservoir last stocked?: The latest reported stocking was Apr 1 to 30, 2025 (brown trout, 1,340 fish), according to New York agency reports.
How often is Mongaup Falls Reservoir stocked?: Across all years on record, most stockings come in April.
What kind of trout are stocked in Mongaup Falls Reservoir?: Brown trout (3 stockings, 3,980 fish).
How warm is the water near Mongaup Falls Reservoir?: The USGS gage read 66°F on Sep 25. Getting warm for trout. Fish early in the morning and land fish quickly.