Knappa Slough & Blind Slough Fishing Regulations
Washington · 2026 size limits, bag limits, and seasons
Knappa Slough & Blind Slough is a slough, Washington. It has its own fishing regulations for 16 species, including Atlantic Sturgeon, Brook Trout, Brown Trout, and Cutthroat Trout. These rules replace Washington's statewide limits on this water.
Fish with special rules on Knappa Slough & Blind Slough
Tap a fish for identification tips, size records, and the best bait.
Knappa Slough & Blind Slough limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesVessel limit rule | – | – | Aug 1 – Dec 31, Year-round |
 Atlantic SturgeonClosed at night | – | Catch & release only | Year-round |
 Brook Trout | – | Catch & release only | May 16 – Mar 31 |
 Brown Trout | – | Catch & release only | May 16 – Mar 31 |
 Cutthroat Trout | – | Catch & release only | May 16 – Mar 31 |
 Golden Trout | – | Catch & release only | May 16 – Mar 31 |
 Green SturgeonClosed at night | – | Catch & release only | Year-round |
| Hatchery Chinook SalmonHatchery fish only · Closed at night | 12" min | – | Year-round |
| Hatchery Coho SalmonHatchery fish only · Closed at night | 12" min | – | Year-round |
| Hatchery SteelheadHatchery fish only · Closed at night | – | – | Year-round |
 Lake SturgeonClosed at night | – | Catch & release only | Year-round |
 Lake Trout | – | Catch & release only | May 16 – Mar 31 |
 Rainbow Trout | – | Catch & release only | May 16 – Mar 31 |
| Shad | – | – | Year-round |
 Shovelnose SturgeonClosed at night | – | Catch & release only | Year-round |
 Steelhead | – | Catch & release only | May 16 – Mar 31 |
 White SturgeonClosed at night | – | Catch & release only | Year-round |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
Plan your Knappa Slough & Blind Slough trip
Knappa Slough & Blind Slough fishing: common questions
What fish have special regulations on Knappa Slough & Blind Slough?
16 species have rules specific to Knappa Slough & Blind Slough: Atlantic Sturgeon, Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Green Sturgeon, Hatchery Chinook Salmon, and Hatchery Coho Salmon, and 8 more.
What is the atlantic sturgeon limit on Knappa Slough & Blind Slough?
Atlantic Sturgeon are catch and release only on Knappa Slough & Blind Slough.
What is the brook trout limit on Knappa Slough & Blind Slough?
Brook Trout are catch and release only on Knappa Slough & Blind Slough. Season: May 16 – Mar 31.
What is the brown trout limit on Knappa Slough & Blind Slough?
Brown Trout are catch and release only on Knappa Slough & Blind Slough. Season: May 16 – Mar 31.
Is Knappa Slough & Blind Slough catch and release?
Some rules on Knappa Slough & Blind Slough are catch and release only, covering Atlantic Sturgeon, Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout and others. Check the table for the section and dates that apply.
Do Washington statewide fishing rules apply on Knappa Slough & Blind Slough?
Where Knappa Slough & Blind Slough 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 Knappa Slough & Blind Slough 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.