Diablo Lake trout stocking
Whatcom County, Washington · lake · about 1,204 ft elevation
Diablo Lake was last stocked 12 months ago (Oct 27, 2025). We have 13 stockings on record since Oct 18, 2016. Most stockings come in October. Species stocked: rainbow trout.
- Number 9 of 34 stocked waters in Whatcom County by stocking days.
- Stocked more often than 72% of Washington waters on our record.
River conditions
USGS gage: DIABLO RESERVOIR NEAR NEWHALEM, WA (1 km away).
- Gage height
- 1202.68 ft
Latest reading Nov 9, 2026, 8:00 AM UTC. USGS data are provisional. Gage page at USGS.
Weather at Diablo Lake
- This Afternoon51°FMostly Sunny1% rain · wind 5 mph
- Tonight41°FMostly Cloudy then Light Rain90% rain · wind 8 mph
- Friday51°FLight Rain97% rain · wind 9 mph
- Friday Night44°FLight Rain82% rain · wind 6 to 9 mph
- Saturday56°FLight Rain Likely60% rain · wind 7 to 12 mph
- Saturday Night43°FRain99% rain · wind 12 to 16 mph
Forecast from the National Weather Service for this location, refreshed hourly.
When is Diablo Lake stocked?
Most stockings come in October.
By month, all years
Year by year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 1 | |||||||||||
| 2024 | 1 | |||||||||||
| 2023 | 1 | |||||||||||
| 2022 | 1 | |||||||||||
| 2021 | 1 | |||||||||||
| 2020 | 1 | |||||||||||
| 2019 | 1 | |||||||||||
| 2018 | 1 | 1 |
What is stocked
| Species | Stockings | Fish | Fish per stocking |
|---|---|---|---|
| Rainbow trout | 13 | 2,452,995 | 188,692 |
Stocking history
20251 stocking · 249,364 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
Oct 27Latest Monday | Rainbow trout | 249,364 249 lb | 51 weeks | Marblemount Hatchery |
20241 stocking · 134,588 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
Nov 4 Monday | Rainbow trout | 134,588 168 lb | 375 days | Marblemount Hatchery |
20231 stocking · 164,244 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
Oct 26 Thursday | Rainbow trout | 164,244 218 lb | 373 days | Marblemount Hatchery |
20221 stocking · 278,347 fish
- Oct 18 rainbow trout, 278,347 fish
20211 stocking · 318,485 fish
- Oct 4 rainbow trout, 318,485 fish
20201 stocking · 249,097 fish
- Oct 6 rainbow trout, 249,097 fish
20191 stocking · 220,891 fish
- Oct 2 rainbow trout, 220,891 fish
20182 stockings · 361,600 fish
- Oct 8 rainbow trout, 276,600 fish
- Apr 4 rainbow trout, 85,000 fish
20172 stockings · 254,750 fish
- Sep 21 rainbow trout, 170,000 fish
- Apr 28 rainbow trout, 84,750 fish
20162 stockings · 221,629 fish
- Oct 28 rainbow trout, 48,700 fish
- Oct 18 rainbow trout, 172,929 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 Diablo Lake?
Whatcom County, Washington. Approximate: the marker is the USGS place-name point for this water, not an agency location.
Stocked waters near Diablo Lake
- Gorge Lakelake · 3 mistocked Oct 27, 2025
- Kitling Lakelake · 14 mistocked Sep 9, 2023
- La Rush Lakelake · 16 mistocked Aug 2, 2025
- Willow Lakelake · 17 mistocked Jul 24, 2023
- Ridley Lakelake · 17 mistocked Jul 24, 2023
- Basin Lakelake · 17 mistocked Aug 2, 2025
- Nugget Lakes (2)lake · 18 mistocked Jul 2, 2020
- Nugget Lakes (1)lake · 18 mistocked Jul 2, 2020
All stocked waters in Whatcom CountyStocked 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?
- Across all years on record, most stockings come in October.
- Is Diablo Lake stocked often?
- Number 9 of 34 stocked waters in Whatcom County by stocking days. Stocked more often than 72% of Washington waters on our record. We count each day the agency reported stocking it.
- What kind of trout are stocked in Diablo Lake?
- Rainbow trout (13 stockings, 2,452,995 fish).