Cooper Lake trout stocking
Kittitas County, Washington · lake · about 2,791 ft elevation
Cooper Lake was last stocked 5 months ago (May 26, 2026). We have 14 stockings on record since May 30, 2017, 1 in the last 12 months (3,000 fish). Most stockings come in May to June. Species stocked: rainbow trout.
- Number 10 of 58 stocked waters in Kittitas County by stocking days.
- Stocked more often than 73% of Washington waters on our record.
Weather at Cooper Lake
- Tonight35°FRain Showers98% rain · wind 9 to 16 mph
- Sunday38°FRain And Snow Showers86% rain · wind 2 to 16 mph
- Sunday Night32°FMostly Cloudy9% rain · wind 3 mph
- Monday40°FCloudy then Rain Showers97% rain · wind 5 mph
- Monday Night36°FRain Showers97% rain · wind 1 to 5 mph
- Tuesday42°FRain Showers80% rain · wind 2 mph
Forecast from the National Weather Service for this location, refreshed hourly.
When is Cooper Lake stocked?
Most stockings come in May to June. Stocked 3 times in 2017, mostly in June, usually on Tuesdays, about every 14 days.
By month, all years
Year by year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | |||||||||||
| 2025 | 1 | |||||||||||
| 2024 | 1 | |||||||||||
| 2023 | 1 | |||||||||||
| 2022 | 1 | |||||||||||
| 2020 | 1 | 1 | ||||||||||
| 2019 | 1 | 1 | ||||||||||
| 2018 | 1 | 1 |
What is stocked
| Species | Stockings | Fish | Fish per stocking |
|---|---|---|---|
| Rainbow trout | 14 | 38,133 | 2,724 |
Stocking history
20261 stocking · 3,000 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
May 26Latest Tuesday | Rainbow trout | 3,000 1,250 lb | 363 days | Naches Hatchery |
20251 stocking · 3,000 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
May 28 Wednesday | Rainbow trout | 3,000 1,250 lb | 365 days | Naches Hatchery |
20241 stocking · 3,000 fish
| Date | Species | Fish | Since previous | Hatchery |
|---|---|---|---|---|
May 28 Tuesday | Rainbow trout | 3,000 1,250 lb | 52 weeks | Naches Hatchery |
20231 stocking · 3,000 fish
- May 30 rainbow trout, 3,000 fish
20221 stocking · 3,000 fish
- Jun 8 rainbow trout, 3,000 fish
20202 stockings · 5,064 fish
- Jun 10 rainbow trout, 2,544 fish
- May 20 rainbow trout, 2,520 fish
20192 stockings · 5,016 fish
- Jun 5 rainbow trout, 2,496 fish
- May 20 rainbow trout, 2,520 fish
20182 stockings · 5,250 fish
- Jun 11 rainbow trout, 2,750 fish
- May 21 rainbow trout, 2,500 fish
20173 stockings · 7,803 fish
- Jun 20 rainbow trout, 283 fish
- Jun 6 rainbow trout, 4,020 fish
- May 30 rainbow trout, 3,500 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 Cooper Lake?
Kittitas County, Washington. Approximate: the marker is the USGS place-name point for this water, not an agency location.
Stocked waters near Cooper Lake
- Diamond Lakelake · 1 mistocked Jul 28, 2023
- Little Joe Lakelake · 3 mistocked Aug 28, 2021
- Thorp Lakelake · 4 mistocked Aug 3, 2026
- Opal Lakelake · 5 mistocked Aug 3, 2025
- Glacier Lakelake · 6 mistocked Oct 7, 2024
- Lila Lakelake · 7 mistocked Jul 6, 2023
- Box Canyon Lakelake · 7 mistocked Sep 21, 2021
- Summit Chief Lakelake · 7 mistocked Jul 18, 2026
All stocked waters in Kittitas CountyStocked this week in Washington
Questions about Cooper Lake
- When was Cooper Lake last stocked?
- The latest reported stocking was May 26, 2026 (rainbow trout, 3,000 fish), according to Washington agency reports.
- How often is Cooper Lake stocked?
- Stocked 3 times in 2017, mostly in June, usually on Tuesdays, about every 14 days. Across all years on record, most stockings come in May to June.
- Is Cooper Lake stocked often?
- Number 10 of 58 stocked waters in Kittitas County by stocking days. Stocked more often than 73% of Washington waters on our record. We count each day the agency reported stocking it.
- What kind of trout are stocked in Cooper Lake?
- Rainbow trout (14 stockings, 38,133 fish).