Cooper Lake fish stocking
Kittitas County, Washington
Cooper Lake in Kittitas County, Washington was last stocked on May 26, 2026 with 3,000 rainbow trout from Naches Hatchery. Across the 5 years shown here, WDFW released 15,000 fish in 5 separate stockings. Stockings here are most common in May and June.
When Cooper Lake gets fish
Stocking history
Washington reports the exact release date. Sizes for Washington are estimated from the reported fish-per-pound.
2026 · 3,000 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 3,000 | 9.4″ | Catchable |
2025 · 3,000 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 3,000 | 9.4″ | Catchable |
2024 · 3,000 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 3,000 | 9.4″ | Catchable |
2023 · 3,000 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 3,000 | 9.4″ | Catchable |
2022 · 3,000 fish
| Date | Species | Fish | Size | Type |
|---|---|---|---|---|
| Rainbow Trout | 3,000 | 9.4″ | Catchable |
Frequently asked questions
When was Cooper Lake last stocked?
WDFW records show Cooper Lake was last stocked on May 26, 2026 (about 4 months ago), with 3,000 rainbow trout.
What fish are stocked in Cooper Lake?
Cooper Lake has been stocked with rainbow trout in the years shown here (2022–2026).
When does Cooper Lake usually get stocked?
Most fish have been stocked in May and June. Exact dates change from year to year, so check back or see WDFW's official stocking page.
Do I need a license to fish Cooper Lake?
Yes, anglers generally need a valid Washington fishing license. Check the current Washington fishing regulations for seasons, limits and any special rules for Cooper Lake.
Other stocked waters in Kittitas County
Middle Kendall Park Lake
Upper Kendall Park Lake
Kachess Lake
Taneum Lake
Mirror Lake
Thorp Lake
All 52 stocked waters in Kittitas County →
Source: WDFW Fish Plants (data.wa.gov). Stocked Lakes is not affiliated with Washington Department of Fish and Wildlife. Spot a problem? Let us know.