When was Lake Boren last stocked?

The latest reported stocking was May 26, 2026 (rainbow trout, 1,350 fish), according to Washington agency reports.

How often is Lake Boren stocked?

It was stocked once in the last 12 months. Across all years on record, most stockings come in April to May.

Is Lake Boren stocked often?

Number 28 of 194 stocked waters in King County by stocking days. Stocked about as often as a typical Washington water on our record. We count each day the agency reported stocking it.

What kind of trout are stocked in Lake Boren?

Rainbow trout (10 stockings, 14,157 fish).

How warm is the water near Lake Boren?

The nearest USGS gage read 50°F on Nov 9. Prime range for trout (about 50 to 65°F): fish are feeding actively.

Lake Boren trout stocking

King County, Washington · lake · about 380 ft elevation

Lake Boren was last stocked 5 months ago (May 26, 2026). We have 10 stockings on record since Apr 25, 2017, 1 in the last 12 months (1,350 fish). Most stockings come in April to May. Species stocked: rainbow trout.

Last stocked

5 months ago

May 26, 2026

Next planned

Not announced

Last 12 months

1 stocking

1,350 fish

Water temperature

50°F

Ideal for trout

Number 28 of 194 stocked waters in King County by stocking days.
Stocked about as often as a typical Washington water on our record.

River conditions

Nearest USGS gage: CEDAR RIVER AT RENTON, WA (6 km away, on a different stream or lake).

Water temperature: 50°F
Flow: 343 cfs; about normal for the last six weeks
Gage height: 8.63 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: 52 °F on Nov 8. The green band is the ideal range for trout.

Streamflow, last six weeks (cfs), daily. Latest: 337 cfs on Nov 7.

Latest reading Nov 9, 2026, 8:15 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Lake Boren

Tonight
48°F
Light Rain
91% rain · wind 6 to 10 mph
Thursday
56°F
Partly Sunny
12% rain · wind 2 to 7 mph
Thursday Night
46°F
Mostly Cloudy then Chance Light Rain
40% rain · wind 5 mph
Friday
54°F
Light Rain
90% rain · wind 6 mph
Friday Night
50°F
Light Rain Likely
70% rain · wind 3 mph
Saturday
63°F
Chance Light Rain
25% rain · wind 5 mph

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

When is Lake Boren stocked?

Most stockings come in April to May.

By month, all years

Stockings of Lake Boren by month, all years on record. This month is shown in blue.

Year by year

	Apr	May
2026		1
2025		1
2024		1
2023	1
2022		1
2021	1
2020	1
2019	1

What is stocked

Species	Stockings	Fish	Fish per stocking
Rainbow trout	10	14,157	1,416

Stocking history

20261 stocking · 1,350 fish

Date	Species	Fish	Since previous	Hatchery
May 26Latest Tuesday	Rainbow trout	1,350 614 lb	379 days	Puyallup Hatchery

20251 stocking · 1,150 fish

Date	Species	Fish	Since previous	Hatchery
May 12 Monday	Rainbow trout	1,150 500 lb	374 days	Puyallup Hatchery

20241 stocking · 1,500 fish

Date	Species	Fish	Since previous	Hatchery
May 3 Friday	Rainbow trout	1,500 750 lb	374 days	Arlington Hatchery

20231 stocking · 1,650 fish

Apr 25 rainbow trout, 1,650 fish

20221 stocking · 1,995 fish

May 10 rainbow trout, 1,995 fish

20211 stocking · 1,530 fish

Apr 28 rainbow trout, 1,530 fish

20201 stocking · 1,357 fish

Apr 23 rainbow trout, 1,357 fish

20191 stocking · 1,200 fish

Apr 29 rainbow trout, 1,200 fish

20181 stocking · 1,225 fish

May 3 rainbow trout, 1,225 fish

20171 stocking · 1,200 fish

Apr 25 rainbow trout, 1,200 fish

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 Lake Boren?

King 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 Lake Boren

Lake Wa Nplake · 2 mistocked Jun 1, 2019
Lewis Creekstream · 4 mistocked May 27, 2025
Duwamish Riverstream · 6 mistocked Jun 9, 2022
Lake Sammamishlake · 6 mistocked Apr 10, 2023
Pine Lakelake · 7 mistocked Apr 13, 2026
Ebright Creekstream · 7 mistocked Mar 22, 2023
Lake Desirelake · 7 mistocked Oct 15, 2026
Zackuse Creekstream · 7 mistocked Feb 16, 2023

All stocked waters in King County Stocked this week in Washington

Questions about Lake Boren

When was Lake Boren last stocked?: The latest reported stocking was May 26, 2026 (rainbow trout, 1,350 fish), according to Washington agency reports.
How often is Lake Boren stocked?: It was stocked once in the last 12 months. Across all years on record, most stockings come in April to May.
Is Lake Boren stocked often?: Number 28 of 194 stocked waters in King County by stocking days. Stocked about as often as a typical Washington water on our record. We count each day the agency reported stocking it.
What kind of trout are stocked in Lake Boren?: Rainbow trout (10 stockings, 14,157 fish).
How warm is the water near Lake Boren?: The nearest USGS gage read 50°F on Nov 9. Prime range for trout (about 50 to 65°F): fish are feeding actively.