Merwin Lake Fishing Regulations
Clark/Cowlitz counties, Washington · 2026 size limits, bag limits, and seasons
Merwin Lake is a lake in Clark/Cowlitz counties, Washington. It has its own fishing regulations for 5 species, including Atlantic Salmon, Chinook Salmon, Coho Salmon, and Pink Salmon. These rules replace Washington's statewide limits on this water.
Map of Merwin Lake
Fish with special rules on Merwin Lake
Tap a fish for identification tips, size records, and the best bait.
Merwin Lake limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
 Atlantic SalmonLandlocked salmon rules apply. | – | – | Year-round |
 Chinook SalmonLandlocked salmon rules apply. | – | – | Year-round |
 Coho SalmonLandlocked salmon rules apply. | – | – | Year-round |
 Pink SalmonLandlocked salmon rules apply. | – | – | Year-round |
 Sockeye SalmonLandlocked salmon rules apply. | – | – | Year-round |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
Plan your Merwin Lake trip
Merwin Lake fishing: common questions
What fish have special regulations on Merwin Lake?
5 species have rules specific to Merwin Lake: Atlantic Salmon, Chinook Salmon, Coho Salmon, Pink Salmon, and Sockeye Salmon.
What is the atlantic salmon limit on Merwin Lake?
No size limit is listed for Atlantic Salmon on Merwin Lake.
What is the chinook salmon limit on Merwin Lake?
No size limit is listed for Chinook Salmon on Merwin Lake.
What is the coho salmon limit on Merwin Lake?
No size limit is listed for Coho Salmon on Merwin Lake.
Do Washington statewide fishing rules apply on Merwin Lake?
Where Merwin Lake has its own rule for a species, that rule replaces the statewide limit. For species not listed on this page, Washington's statewide regulations apply. Regulations are set by the Washington Department of Fish and Wildlife; confirm with the official 2026 regulations before keeping a fish.
Other Washington waters with special regulations
- Yakima River · Benton
- Columbia River
- Wind River · Skamania
- Drano Lake · Skamania
- Naselle River · Pacific
- Roosevelt Lake · Ferry/Grant/Lincoln/Okanogan/Stevens
- Cowlitz River · Cowlitz/Lewis
- Green River · Duwamish
- Grays River · Wahkiakum
- Nisqually River · Pierce/Thurston
- Nooksack River · Whatcom
- Humptulips River · Grays Harbor
Take Merwin Lake rules on the water
Identify your catch, check if it's a keeper, and log it. CatchVault is on iOS, with Android on the way.