Hamma Hamma River Fishing Regulations
Mason County, Washington · 2026 size limits, bag limits, and seasons
Hamma Hamma River is a river in Mason County, Washington. It has its own fishing regulations for 8 species, including Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout. These rules replace Washington's statewide limits on this water.
Map of Hamma Hamma River
Fish with special rules on Hamma Hamma River
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Hamma Hamma River limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesSelective gear rules apply. | – | – | Always open |
 Brook Trout | – | – | May 23 – Aug 31 |
 Brown Trout | – | – | May 23 – Aug 31 |
 Cutthroat Trout | – | – | May 23 – Aug 31 |
| – | Catch & release only | May 23 – Aug 31 | |
 Golden Trout | – | – | May 23 – Aug 31 |
 Lake Trout | – | – | May 23 – Aug 31 |
 Rainbow Trout | – | – | May 23 – Aug 31 |
 Steelhead | – | – | May 23 – Aug 31 |
| Wild Rainbow TroutWild fish only | – | Catch & release only | May 23 – Aug 31 |
– means no limit is listed for this water. Rules not shown here follow Washington's statewide regulations.
Plan your Hamma Hamma River trip
Hamma Hamma River fishing: common questions
What fish have special regulations on Hamma Hamma River?
8 species have rules specific to Hamma Hamma River: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, Steelhead, and Wild Rainbow Trout.
What is the brook trout limit on Hamma Hamma River?
No size limit is listed for Brook Trout on Hamma Hamma River. Season: May 23 – Aug 31.
What is the brown trout limit on Hamma Hamma River?
No size limit is listed for Brown Trout on Hamma Hamma River. Season: May 23 – Aug 31.
What is the cutthroat trout limit on Hamma Hamma River?
No size limit is listed for Cutthroat Trout on Hamma Hamma River. Season: May 23 – Aug 31. Limits change during the year.
Is Hamma Hamma River catch and release?
Some rules on Hamma Hamma River are catch and release only, covering Cutthroat Trout and Wild Rainbow Trout. Check the table for the section and dates that apply.
Do Washington statewide fishing rules apply on Hamma Hamma River?
Where Hamma Hamma River 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
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