When was Foss Lake last stocked?

The latest reported stocking was Aug 26, 2026 (rainbow trout, 200 fish), according to Washington agency reports.

How often is Foss Lake stocked?

It was stocked 1 times in the last 12 months.

What kind of trout are stocked in Foss Lake?

Rainbow trout (1 stocking, 200 fish).

How warm is the water near Foss Lake?

The nearest USGS gage read 53°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Foss Lake trout stocking

Skagit County, Washington · lake

Foss Lake was last stocked 4 weeks ago (Aug 26, 2026). We have 1 stocking on record since Aug 26, 2026, 1 in the last 12 months (200 fish). Species stocked: rainbow trout.

Last stocked

4 weeks ago

Aug 26, 2026

Next planned

Not announced

Last 12 months

1 stocking

200 fish

Water temperature

53°F

Ideal for trout

River conditions

Nearest USGS gage: CASCADE RIVER AT MARBLEMOUNT, WA (7 km away, on a different stream or lake).

Water temperature: 53°F
Flow: 182 cfs; lower than usual for the last six weeks
Gage height: 11.40 ft

Ideal for trout. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Water temperature (daily high), last six weeks (°F), daily. Latest: 55 °F on Sep 23. The green band is the ideal range for trout.

Streamflow, last six weeks (cfs), daily. Latest: 201 cfs on Sep 23.

Latest reading Sep 25, 2026, 2:45 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Foss Lake

Tonight
43°F
Rain
97% rain · wind 5 mph
Friday
48°F
Showers And Thunderstorms
100% rain · wind 3 to 10 mph
Friday Night
37°F
Rain And Snow
97% rain · wind 7 to 15 mph
Saturday
43°F
Partly Sunny
11% rain · wind 2 to 7 mph
Saturday Night
35°F
Partly Cloudy
1% rain · wind 2 to 9 mph
Sunday
48°F
Mostly Sunny
1% rain · wind 2 to 8 mph

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

What is stocked

Species	Stockings	Fish	Fish per stocking	Typical size
Rainbow trout	1	200	200

Stocking history

Date	Species	Fish	Pounds	Hatchery
Aug 26, 2026	Rainbow trout	200	1	Arlington Hatchery

From Washington 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 Foss Lake?

Skagit County, Washington. Approximate: the marker is the USGS place-name point for this water, not an agency location.

Directions Larger map

Stocked waters near Foss Lake

Basin Lakelake · 4 mistocked Aug 2, 2025
La Rush Lakelake · 4 mistocked Aug 2, 2025
Skaro Lakelake · 6 mistocked Sep 19, 2026
Cyclone Lakelake · 6 mistocked Oct 4, 2025
Lake Louiselake · 7 mistocked Aug 10, 2025
Caskey Lakelake · 11 mistocked May 19, 2026
Texas Pondpond · 13 mistocked Aug 1, 2025
Long Gone Lakelake · 13 mistocked Aug 31, 2025

All stocked waters in Skagit County Stocked this week in Washington

Questions about Foss Lake

When was Foss Lake last stocked?: The latest reported stocking was Aug 26, 2026 (rainbow trout, 200 fish), according to Washington agency reports.
How often is Foss Lake stocked?: It was stocked 1 times in the last 12 months.
What kind of trout are stocked in Foss Lake?: Rainbow trout (1 stocking, 200 fish).
How warm is the water near Foss Lake?: The nearest USGS gage read 53°F on Sep 25. Prime range for trout (about 50 to 65°F): fish are feeding actively.