Lake Merwin trout stocking
Cowlitz County, Washington · lake
Lake Merwin was last stocked 2 months ago (Jul 13, 2026). We have 10 stockings on record since Jul 14, 2025, 3 in the last 12 months (46,391 fish). Most stockings come in July. Species stocked: rainbow trout, kokanee.
Last stocked
2 months ago
Jul 13, 2026
Next planned
Not announced
Last 12 months
3 stockings
46,391 fish
On record
10 stockings
since Jul 14, 2025
When is Lake Merwin stocked?
Most stockings come in July.
By month, all years
Year by year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 1 | ||||||||||
| 2025 | 1 | 1 |
What is stocked
| Species | Stockings | Fish | Fish per stocking | Typical size |
|---|---|---|---|---|
| Rainbow trout | 8 | 10,076 | 1,260 | |
| Kokanee | 2 | 41,280 | 20,640 |
Stocking history
| Date | Species | Fish | Pounds | Hatchery |
|---|---|---|---|---|
| Jul 13, 2026 | Rainbow trout | 1,732 | 2,474 | Merwin Hatchery |
| Jul 13, 2026 | Rainbow trout | 821 | 2,737 | Merwin Hatchery |
| Jul 13, 2026 | Rainbow trout | 826 | 2,753 | Merwin Hatchery |
| Jul 13, 2026 | Rainbow trout | 1,732 | 2,474 | Merwin Hatchery |
| Feb 23, 2026 | Kokanee | 5,710 | 2,360 | Speelyai Hatchery |
| Oct 1, 2025 | Kokanee | 35,570 | 3,148 | Speelyai Hatchery |
| Jul 14, 2025 | Rainbow trout | 784 | 2,613 | Merwin Hatchery |
| Jul 14, 2025 | Rainbow trout | 1,699 | 2,427 | Merwin Hatchery |
| Jul 14, 2025 | Rainbow trout | 783 | 2,610 | Merwin Hatchery |
| Jul 14, 2025 | Rainbow trout | 1,699 | 2,427 | Merwin Hatchery |
From Washington fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.
Other stocked waters in Cowlitz County
- Horseshoe Lakelakestocked May 15, 2026
- Kress Lakelakestocked May 6, 2026
- Lake Sacajawealakestocked May 6, 2026
- Cowlitz Riverstreamstocked Apr 15, 2026
- Silver Lakelakestocked Jan 2, 2026
All stocked waters in Cowlitz CountyStocked this week in Washington
Questions about Lake Merwin
- When was Lake Merwin last stocked?
- The latest reported stocking was Jul 13, 2026 (rainbow trout, 1,732 fish), according to Washington agency reports.
- How often is Lake Merwin stocked?
- It was stocked 3 times in the last 12 months. Across all years on record, most stockings come in July.
- What kind of trout are stocked in Lake Merwin?
- Rainbow trout (8 stockings, 10,076 fish); Kokanee (2 stockings, 41,280 fish).