When was Thornton Lake last stocked?

The latest reported stocking was Oct 9, 2022 (rainbow trout, 380 fish), according to Washington agency reports.

Is Thornton Lake stocked often?

Number 59 of 127 stocked waters in Snohomish County by stocking days. Stocked less often than most Washington waters on our record. We count each day the agency reported stocking it.

What kind of trout are stocked in Thornton Lake?

Rainbow trout (2 stockings, 760 fish).

How warm is the water near Thornton Lake?

The nearest USGS gage read 54°F on Sep 29. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Thornton Lake trout stocking

Snohomish County, Washington · lake · about 4,394 ft elevation

Thornton Lake was last stocked 48 months ago (Oct 9, 2022). We have 2 stockings on record since Aug 28, 2018. Species stocked: rainbow trout.

Last stocked

48 months ago

Oct 9, 2022

Next planned

Not announced

Last 12 months

0 stockings

Water temperature

54°F

Ideal for trout

Number 59 of 127 stocked waters in Snohomish County by stocking days.
Stocked less often than most Washington waters on our record.

River conditions

Nearest USGS gage: SAUK RIVER AB WHITE CHUCK RIVER NR DARRINGTON, WA (6 km away, on a different stream or lake).

Water temperature: 54°F
Flow: 151 cfs; about normal for the last six weeks
Gage height: 2.41 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 27. The green band is the ideal range for trout.

Streamflow, last six weeks (cfs), daily. Latest: 184 cfs on Sep 27.

Latest reading Sep 29, 2026, 12:15 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Thornton Lake

Tonight
43°F
Rain
90% rain · wind 3 to 9 mph
Tuesday
46°F
Rain
100% rain · wind 1 to 5 mph
Tuesday Night
38°F
Light Rain Likely then Mostly Cloudy
63% rain · wind 1 to 5 mph
Wednesday
49°F
Mostly Sunny
2% rain · wind 2 mph
Wednesday Night
41°F
Mostly Cloudy
13% rain · wind 1 to 5 mph
Thursday
53°F
Chance Light Rain
29% rain · wind 0 to 3 mph

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

What is stocked

Species	Stockings	Fish	Fish per stocking
Rainbow trout	2	760	380

Stocking history

20221 stocking · 380 fish

Date	Species	Fish	Since previous	Hatchery
Oct 9Latest Sunday	Rainbow trout	380 1 lb	1503 days	Arlington Hatchery

20181 stocking · 380 fish

Date	Species	Fish	Since previous	Hatchery
Aug 28 Tuesday	Rainbow trout	380 2 lb		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. Seasons and limits: Washington fishing regulations.

Where is Thornton Lake?

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

Directions Larger map Washington fishing regulations

Stocked waters near Thornton Lake

White Chuck Lakeslake · 1 mistocked Aug 27, 2023
Indigo Lakelake · 4 mistocked Sep 1, 2023
Peek-A-Boo Lakelake · 6 mistocked Sep 3, 2026
North Lakelake · 7 mistocked Jul 9, 2026
Emerald Lakelake · 7 mistocked Sep 2, 2023
Round Lakelake · 7 mistocked Sep 9, 2024
Diamond Lakelake · 8 mistocked Jul 21, 2021
Pass Lakelake · 8 mistocked Sep 20, 2025

All stocked waters in Snohomish County Stocked this week in Washington

Questions about Thornton Lake

When was Thornton Lake last stocked?: The latest reported stocking was Oct 9, 2022 (rainbow trout, 380 fish), according to Washington agency reports.
Is Thornton Lake stocked often?: Number 59 of 127 stocked waters in Snohomish County by stocking days. Stocked less often than most Washington waters on our record. We count each day the agency reported stocking it.
What kind of trout are stocked in Thornton Lake?: Rainbow trout (2 stockings, 760 fish).
How warm is the water near Thornton Lake?: The nearest USGS gage read 54°F on Sep 29. Prime range for trout (about 50 to 65°F): fish are feeding actively.