Merwin Reservoir was formed after the completion of Merwin Dam, in 1931 by the Inland Power and Light Company. The reservoir fluctuates depending on the amount of run-off making boat access difficult at times.
Kokanee are the main target, however, Tiger Muskie planted in 1995 are also popular with anglers. This North Fork Lewis River impoundment located near the town of Ariel, on the south side of Highway SR503, is shared by Clark and Cowlitz counties.
All Bull Trout and Dolly Varden must be released.
PacifiCorp operates boat launches at Speelyai Bay and Cresap Bay. There is a fee to launch on weekends. Call 800-547-1501 for updated reservoir levels.
There is very limited shore access.
Two-pole fishing is allowed
Shoreline access: Good - Very limited.
Species you might catch
Lake information
Counties:
Cowlitz, Clark
Acreage: 3835.60 ac.
Elevation: 242 ft.
Center: 45.979477, -122.448448
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Catchable fish plants
Stock Date | Species | Number Released | Number of Fish Per Pound | Facility |
---|---|---|---|---|
Jul 15, 2024 | Rainbow | 942 | 0.7 | MERWIN HATCHERY |
Jul 15, 2024 | Rainbow | 942 | 0.7 | MERWIN HATCHERY |
Jul 15, 2024 | Rainbow | 788 | 0.2 | MERWIN HATCHERY |
Jul 15, 2024 | Rainbow | 765 | 0.2 | MERWIN HATCHERY |
Jul 10, 2023 | Rainbow | 668 | 1 | MERWIN HATCHERY |
Jul 10, 2023 | Rainbow | 668 | 1 | MERWIN HATCHERY |
Jul 10, 2023 | Rainbow | 906 | 0.25 | MERWIN HATCHERY |
Jul 10, 2023 | Rainbow | 891 | 0.25 | MERWIN HATCHERY |
Jul 13, 2022 | Rainbow | 583 | 1.33 | MERWIN HATCHERY |
Jul 13, 2022 | Rainbow | 979 | 0.25 | MERWIN HATCHERY |