Cooper Lake fishing

Cooper Lake fishing is stocked with Rainbow Trout, Brook Trout, Brown Trout, Bull trout, Cutthroat trout, Kokanee, and 1 more on a natural lake. It is stocked about once a year since 2025, most often in May. Species guides list dawn and dusk for Rainbow Trout and dawn, day, and dusk for Brook Trout and Brown Trout.

Illustration, not a photo of this lake
Last stocked
May 26, 2026
127 days ago · Rainbow Trout
Plants on record
2
Since 2025
Species recorded
1
Average size
10.2 in
Surface acres
129.4
Elevation
2,792 ft

Fish at Cooper Lake

1 stocked · 7 confirmed present

Rainbow Trout Stocked · 2 plants · last May 26, 2026 Best: dawn, dusk

Last stocked May 26, 2026 · avg 10.2 in · 2 plants

Best: dawn, dusk

Rainbow Trout species guide
Brook trout Confirmed present Best: dawn, day, dusk

Best: dawn, day, dusk

Brook trout species guide
Brown trout Confirmed present Best: dawn, day, dusk

Best: dawn, day, dusk

Brown trout species guide
Bull trout Confirmed present
Bull trout species guide
Cutthroat trout Confirmed present
Cutthroat trout species guide
Kokanee Confirmed present
Kokanee species guide
Westslope cutthroat trout Confirmed present
Westslope cutthroat trout species guide

How Cooper Lake is stocked

Source: Washington Department of Fish and Wildlife.

About 46 reported fish per acre, the fewest of 7 lakes in Kittitas County with both a fish count and a surface area.

Fish stocked in 2025

3,000

Fish stocked in 2026

3,000

Stocking history

Source: Washington Department of Fish and Wildlife.
Date Species Quantity Avg. length Source
May 26, 2026 Rainbow Trout 3,000 10.2 in report
May 28, 2025 Rainbow Trout 3,000 10.2 in report

Access and facts

Water type
natural lake
Shore access
Yes
Boat ramp
Yes

Shoreline access: Good. Shoreline access via US Forest Service campground.

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Nearest lakes

Lavender Lake 14.5 mi last stocked June 2, 2026 Kiwanis Pond 20.5 mi last stocked June 29, 2026 Blackbird Island Pond 26.4 mi last stocked July 2, 2026 Rattlesnake Lake 27.9 mi last stocked April 6, 2026 Indian Flat Pond 30.7 mi last stocked June 3, 2026

Camping near Cooper Lake

Campgrounds within 15 miles of Cooper Lake's mapped point, nearest first: Owhi camping (0.4 miles), Salmon La Sac Campground (4 miles), Cayuse Horse Camp (4.3 miles), Red Mountain Campground (5.4 miles), and French Cabin camping (5.8 miles), each with its own campground page on campgroundsdb.com.

Straight-line distances.

Public land at Cooper Lake

Cooper Lake is inside Okanogan-Wenatchee National Forest.

Boundaries from Public Lands DB, part of the same network.

Common questions

What fish are at Cooper Lake?

Fishing Cooper Lake usually means Rainbow Trout. All 2 plants on record are Rainbow Trout. Rainbow Trout was last stocked May 26, 2026, averaging 10.2 in. Brook trout, Brown trout, Bull trout, and Cutthroat trout, plus 2 more are recorded here outside the stocking reports.

When is Cooper Lake stocked?

Last stocked May 26, 2026. It is stocked about once a year since 2025, most often in May. About 46 reported fish per acre, the fewest of 7 lakes in Kittitas County with both a fish count and a surface area.

How big are the fish stocked at Cooper Lake?

Rainbow Trout stocked at Cooper Lake average 10.2 in.

How do you get on Cooper Lake?

Shore fishing is available and there is a boat ramp. Shoreline access: Good. Shoreline access via US Forest Service campground.

Which lakes near Cooper Lake were stocked more recently?

Lavender Lake (14.5 mi), Kiwanis Pond (20.5 mi), Blackbird Island Pond (26.4 mi), and Indian Flat Pond (30.7 mi) were stocked more recently. Lavender Lake is also stocked with Rainbow Trout, Kiwanis Pond is also stocked with Rainbow Trout, and Indian Flat Pond is also stocked with Rainbow Trout.

Sources (1) +