Cooper Lake

Species you might catch

Lake information

County: Kittitas
Acreage: 129.40 ac.
Elevation: 2792 ft.
Center: 47.426187, -121.176924
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Fish stocking info

Release Location: COOPER LK (KITT)
Stock Date Species Number Released Number of Fish Per Pound Facility
Jun 8, 2022 Rainbow 3,000 2.4 NACHES HATCHERY
Jun 10, 2020 Rainbow 2,544 2.4 NACHES HATCHERY
May 20, 2020 Rainbow 2,520 2.4 NACHES HATCHERY
Jun 5, 2019 Rainbow 2,496 2.4 NACHES HATCHERY
May 20, 2019 Rainbow 2,520 2.4 NACHES HATCHERY
Jun 11, 2018 Rainbow 2,750 2.5 NACHES HATCHERY
May 21, 2018 Rainbow 2,500 2.5 NACHES HATCHERY
Jun 20, 2017 Rainbow 283 0.3 TROUT LODGE COMMERCIAL
Jun 6, 2017 Rainbow 4,020 2.4 NACHES HATCHERY
May 30, 2017 Rainbow 3,500 2.5 NACHES HATCHERY

Fishing prospects calendar

Rainbow trout

Fishing success for Rainbow Trout is generally best in the spring when thousands of fish are stocked statewide, but they can be caught year-round in most waters with a little patience and persistence. Success remains high into June and gradually declines as water temperatures increase and fish move offshore to stay cool. Fish that escaped the spring harvest return to the nearshore areas in the fall as waters cool off. Some waters may also be stocked again in the fall further boosting catch rates.
Chart showing fishing prospects throughout the calendar year

Westslope cutthroat trout

See chart for details.
Chart of fishing prospects throughout the calendar year


The Kokanee fishery typically lasts from April-October before the adults leave the lake to spawn in tributaries starting in late-October and early-November. Fishing is best in the spring before they move into deeper water to avoid warming water temperatures, but they can be targeted throughout the summer in deeper offshore areas near the thermocline. There may be a slight uptick in some waters in the fall as adults return to shallower water and move near shore towards spawning tributaries.
Chart of fishing prospects throughout the calendar year