Lake Merwin Fishing and Stocking
Cowlitz County, Washington. The Washington Department of Fish and Wildlife lists 5 stockings here in the latest year of its data (Kokanee, Rainbow Trout and Tiger Musky), the most recent on Oct 1, 2026. Stocked in March, April, July and October in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 1, 2026 | Kokanee | 45,000 | Legals, 8.0 fish per pound |
| Jul 13, 2026 | Rainbow Trout | 826 | Legals, 0.3 fish per pound |
| Jul 13, 2026 | Rainbow Trout | 1,732 | Legals, 0.7 fish per pound |
| Apr 29, 2026 | Tiger Musky | 1,950 | Legals, 3.39 fish per pound |
| Feb 23, 2026 | Kokanee | 5,710 | Legals, 2.42 fish per pound |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 1, 2025 | Kokanee | 35,570 | Fry, 11.3 fish per pound |
| Jul 14, 2025 | Rainbow Trout | 784 | Legals, 0.3 fish per pound |
| Jul 14, 2025 | Rainbow Trout | 1,699 | Legals, 0.7 fish per pound |
| Apr 29, 2025 | Tiger Musky | 1,939 | Legals, 3.2 fish per pound |
| Mar 1, 2025 | Kokanee | 50,700 | Legals, 6.46 fish per pound |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Oct 7, 2024 | Kokanee | 45,750 | Legals, 8.13 fish per pound |
| Jul 15, 2024 | Rainbow Trout | 765 | Legals, 0.2 fish per pound |
| Jul 15, 2024 | Rainbow Trout | 942 | Legals, 0.7 fish per pound |
| May 6, 2024 | Tiger Musky | 869 | Legals, 3.18 fish per pound |
| Mar 1, 2024 | Kokanee | 52,850 | Legals, 6.13 fish per pound |
Other Stocked Waters in Cowlitz County
About This Data
Every row comes from the stocking information published by the Washington Department of Fish and Wildlife, checked Nov 3, 2026. The agency lists this water as “LK MERWIN (COWL)”. Species and sizes are given as the agency names them; a dash means the agency does not say.
More for Washington Anglers
Stocking dates and places can change without notice; check with the agency before a trip. ReelTourney is not affiliated with the Washington Department of Fish and Wildlife.