When was Diablo Lake last stocked?

The latest reported stocking was Oct 27, 2025 (rainbow trout, 249,364 fish), according to Washington agency reports.

How often is Diablo Lake stocked?

It was stocked 1 times in the last 12 months.

What kind of trout are stocked in Diablo Lake?

Rainbow trout (1 stocking, 249,364 fish).

Diablo Lake trout stocking

Whatcom County, Washington · lake

Diablo Lake was last stocked 11 months ago (Oct 27, 2025). We have 1 stocking on record since Oct 27, 2025, 1 in the last 12 months (249,364 fish). Species stocked: rainbow trout.

Last stocked

11 months ago

Oct 27, 2025

Next planned

Not announced

Last 12 months

1 stocking

249,364 fish

On record

1 stockings

since Oct 27, 2025

River conditions

USGS gage: DIABLO RESERVOIR NEAR NEWHALEM, WA (1 km away).

Gage height: 1202.38 ft

Latest reading Sep 25, 2026, 2:00 AM UTC. USGS data are provisional. Gage page at USGS.

Weather at Diablo Lake

Tonight
53°F
Light Rain
97% rain · wind 5 to 8 mph
Friday
60°F
Showers And Thunderstorms
100% rain · wind 5 to 12 mph
Friday Night
45°F
Rain
100% rain · wind 9 to 15 mph
Saturday
60°F
Slight Chance Light Rain then Mostly Sunny
16% rain · wind 1 to 9 mph
Saturday Night
42°F
Partly Cloudy
wind 2 to 7 mph
Sunday
64°F
Mostly Sunny
wind 1 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	249,364	249,364

Stocking history

Date	Species	Fish	Pounds	Hatchery
Oct 27, 2025	Rainbow trout	249,364	249	Marblemount 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 Diablo Lake?

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

Directions Larger map

Stocked waters near Diablo Lake

Gorge Lakelake · 3 mistocked Oct 27, 2025
La Rush Lakelake · 16 mistocked Aug 2, 2025
Basin Lakelake · 17 mistocked Aug 2, 2025
Foss Lakelake · 20 mistocked Aug 26, 2026
Skaro Lakelake · 21 mistocked Sep 19, 2026
Shuksan Lakelake · 21 mistocked Jul 12, 2025
Watson Lakeslake · 21 mistocked Jul 29, 2025
Cyclone Lakelake · 22 mistocked Oct 4, 2025

All stocked waters in Whatcom County Stocked this week in Washington

Questions about Diablo Lake

When was Diablo Lake last stocked?: The latest reported stocking was Oct 27, 2025 (rainbow trout, 249,364 fish), according to Washington agency reports.
How often is Diablo Lake stocked?: It was stocked 1 times in the last 12 months.
What kind of trout are stocked in Diablo Lake?: Rainbow trout (1 stocking, 249,364 fish).